Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7e06f274260da3f…

MALICIOUS

PDF

97.7 KB Created: 2021-08-07 04:41:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 215061f529f522ecb87d4d6b1305ba7d SHA-1: bc0e8b6fc296dca0c07ea75161524b57950dfae4 SHA-256: f7e06f274260da3f57ca0afc2dc2b5c91d881ccf48bab2744272aa12ab1db538
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many of which are identified as pointing to compromised CMS uploads or disposable hosting, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and link farm behavior are indicative of a lure to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://driver-jazda.pl/upload/file/27327874287.pdf In PDF document text
    • https://www.heainc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bcedf531adf---sanakokutikixunexox.pdfIn PDF document text
    • http://luchetti.it/userfiles/files/rikavanunoxekisajidunoxu.pdfIn PDF document text
    • https://verandapattaya.com/userfiles/files/diguwimurozenon.pdfIn PDF document text
    • https://postscriptproductions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d045b45d5a---47358842475.pdfIn PDF document text
    • https://xo-sound.ru/userfiles/file/97428873606.pdfIn PDF document text
    • http://fzcce.com/aimgs/uload/files/jogog.pdfIn PDF document text
    • http://alemotta.com/resources/original/file/litabajewuxeda.pdfIn PDF document text
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/161000e6b58f5b---musotumakis.pdfIn PDF document text
    • http://www.humillacionyestrella.org/ckfinder/userfiles/files/26321768097.pdfIn PDF document text
    • http://muaah.ca/userfiles/files/xiresefuzuvelurilu.pdfIn PDF document text
    • https://telewebmarketing.com/FCKeditor/file/lopoleneguvavox.pdfIn PDF document text
    • http://ambulatorioveterinariopisillibertozzi.eu/userfiles/files/76326839607.pdfIn PDF document text
    • http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c567a98d99f---rulisaku.pdfIn PDF document text
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7c03c150ad---tegorazesilexawarojugi.pdfIn PDF document text
    • http://apartmaji-zunicmile.com/uporabnik/file/firozarenorubojamamume.pdfIn PDF document text
    • https://sedefartphotography.com/resimler/files/bifelapugomi.pdfIn PDF document text
    • https://www.apollopowersystems.com/wp-content/plugins/super-forms/uploads/php/files/750dce1eb55b06440be2509f1ad86ad1/parez.pdfIn PDF document text
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/160c66fe39414c---bejofiridore.pdfIn PDF document text
    • http://garderoba.sk/images/_file/sivogakelononuwabofitoga.pdfIn PDF document text
    • https://expresstestingatl.com/wp-content/plugins/super-forms/uploads/php/files/707cc06c923e5c693d002d445e857849/14243590731.pdfIn PDF document text
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7fb0b4e0b3---tozejenepijidulutav.pdfIn PDF document text
    • https://garnet-medical.com/userfiles/files/57148432977.pdfIn PDF document text
    • https://bio-obst-und-gemuese.de/userfiles/file/55135748189.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=how+to+get+lucky+blocks+mod+in+minecraft+education+editionPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010350.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10350 18476 bytes
SHA-256: 9940f756961dcf054b302c173a786b1045503e0f738a78984861e8606708e062
font_01_sfnt_off0001344c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1344C 3692 bytes
SHA-256: acb6286f9672d71e52df1f42ea692038c720477feb41743292ae5f85e9f5255a
font_02_sfnt_off0001426c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1426C 11344 bytes
SHA-256: b34c1826aabcc5165531b4117f1e45f275274883b06a4e2296dd4733ced1cd21
font_03_sfnt_off00015cef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15CEF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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