Malicious PDF — malware analysis report

Static analysis result for SHA-256 65afcdfcbbe9d4f8…

MALICIOUS

PDF

90.0 KB Created: 2021-07-28 05:41:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: e03e038163af32fcc2d2dd1bc681ecd2 SHA-1: a24006a079494b537c3334c8b6a06fec11dd8ec7 SHA-256: 65afcdfcbbe9d4f8acb122002517f8b4d8b6f86ec800974442576d11a5a37dfb
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file exhibits multiple indicators of malicious activity, including links to compromised WordPress sites and a high ML classifier score. The presence of a 'download button' lure suggests an attempt to trick the user into downloading a secondary payload. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature, likely involving exploitation for client execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9905

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608605c4ca255---jefafupagosusakulitima.pdf In PDF document text
    • http://eastendmediation.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/89347859736.pdfIn PDF document text
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607b13e538705---zorojifelutafiwo.pdfIn PDF document text
    • https://lordoptika.hu/files/files/89268213353.pdfIn PDF document text
    • http://ave-france.com/pics/files/zivopad.pdfIn PDF document text
    • http://omonetach.pl/foto/ilustracje/file/83353068819.pdfIn PDF document text
    • http://promador.pl/userfiles/file/gorobiseg.pdfIn PDF document text
    • https://avonsteel.com/UserFiles/file/varesaporus.pdfIn PDF document text
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1a627992cf---17556713891.pdfIn PDF document text
    • https://ready4use.ru/uploads/files/33433173644.pdfIn PDF document text
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cb0a365dab---85566257248.pdfIn PDF document text
    • http://argentum.com/wp-content/plugins/super-forms/uploads/php/files/huqaiv27emmnu2htq1boonuiqd/nofulexagexiwixezeboniris.pdfIn PDF document text
    • https://menu2uplus.com/images/file/lovozexawogimox.pdfIn PDF document text
    • http://assessmentinsight.com/ckfinder/userfiles/files/dozuniwikuzixoxodep.pdfIn PDF document text
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086f2abbe874---nujotumemowivewoximox.pdfIn PDF document text
    • https://aravlicraft.com/cmsCart//upload/file/82158724473.pdfIn PDF document text
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/160848911dee4b---wales.pdfIn PDF document text
    • http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c69aaae6ba6---revugozebivaki.pdfIn PDF document text
    • http://doks-films.com/pcms/content/file/34729335468.pdfIn PDF document text
    • http://ambulatorioveterinariocigliano.com/userfiles/files/samuguzifotozogafagim.pdfIn PDF document text
    • http://altaprecision.com/userfiles/file/61889588716.pdfIn PDF document text
    • http://lumieretvie.com/userfiles/file/28934370938.pdfIn PDF document text
    • http://www.adarshvidhyasankul.org/userfilesfile/nibelekexazovojiremubemu.pdfIn PDF document text
    • http://xn--80aafkqcanfpgnhbng3b5i9a.xn--p1ai/pict/file/kelitawovanuwofozuv.pdfIn PDF document text
    • https://www.ptlittleflower.org/wp-content/plugins/super-forms/uploads/php/files/it9b9t5rn5611d23t6ojofk63p/gafuremidozefalaf.pdfIn PDF document text
    • http://boathousebrokerage.com/userfiles/file/48749914089.pdfIn PDF document text
    • https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/160fbb1fc2fcf6---rubizevakuvizinuvuraxa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=download+pes+jogress+2020+ppssppPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fa7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA7B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001128d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1128D 17496 bytes
SHA-256: 1774ddeffb060ad9c13e9dc41a4e3dee76efc3a04e948dbd842b83e463e5f6f8
font_02_sfnt_off000140ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x140AE 10836 bytes
SHA-256: 1e421988bae3ea0f39cfdb3ba1cd7a9dc5215559bee6de4c651e4847f456a5ec

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