Malicious PDF — malware analysis report

Static analysis result for SHA-256 f10888200dbec063…

MALICIOUS

PDF

68.4 KB Created: 2021-09-29 00:20:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 3b80bd4959f33db561e89baa5376a011 SHA-1: 7998d6d9feaf29e04e99de4f7b480c09251c1979 SHA-256: f10888200dbec063c2eaae763d906d312c9a49055893ac9b8a0d140d1cae7190
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous embedded URLs pointing to other PDFs hosted on potentially compromised or disposable domains. This pattern is commonly used to obscure the ultimate destination of malicious content, often for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

Heuristics 6

  • 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 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 https://oniceh.ru/uplcv?utm_term=apex+pro+launcher+apk PDF link annotation
    • http://texinpack.com/uploadfile/file///2021090223060272.pdfIn PDF document text
    • http://bidadapatidar.com/userfiles/file/84565025348.pdfIn PDF document text
    • http://fabiocaronearchitetto.com/userfiles/files/59580884124.pdfIn PDF document text
    • http://bm-shower.com/userfiles/files/70278328844.pdfIn PDF document text
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/161337f213eb63---94625899718.pdfIn PDF document text
    • http://donleroy.net/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/20402718678.pdfIn PDF document text
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/16145655007bc8---61974992830.pdfIn PDF document text
    • https://protectname.xyz/whoisprivacy/userfiles/files/59907096929.pdfIn PDF document text
    • http://zhongguohuachun.com/d/files/gusexoreruxuxujun.pdfIn PDF document text
    • http://www.macrolepidoptera.hu/userfiles/files/jakonixukogim.pdfIn PDF document text
    • http://h-p-n.fr/catalogue_dynamique/file/96420765242.pdfIn PDF document text
    • http://canadianrockies.info/files/file/xiweje.pdfIn PDF document text
    • http://lnv-cnc.gr/userfiles/file/230759770.pdfIn PDF document text
    • http://goodfortune.hk/UpLoadFile/file///suvememupukupuli.pdfIn PDF document text
    • https://cbconsulting112.ca/userfiles/files/81510549479.pdfIn PDF document text
    • https://mobiligennari.com/userfiles/file/rudatevogefofawofafuzo.pdfIn PDF document text
    • http://vidol.nl/userfiles/file/nanenazoxobunazigutemajup.pdfIn PDF document text
    • http://dzirerealtors.com/uploads/veramebaj.pdfIn PDF document text
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614989b22854c---nifaputuvikomowul.pdfIn PDF document text
    • https://www.andimoda.com/wp-content/plugins/super-forms/uploads/php/files/9cd86230ae3049b39edc626157ff8fe4/76300977912.pdfIn PDF document text
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/706699f7e5beccb06006e45fa56a7c22/xabemodonuseviw.pdfIn PDF document text
    • https://infoenergie-loire.org/userfiles/file/mowixatigokuduvuzebeje.pdfIn PDF document text
    • http://szerecsen.hu/editor_up/18250265909.pdfIn PDF document text
    • https://ytdrive.com/CKEdit/upload/files/xomin.pdfIn PDF document text
    • 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_off0000aff3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAFF3 10388 bytes
SHA-256: 9bfb4b418d0ff9de24751eb8d2f726563f23c99d7b63080ede6fdcfc8429e433
font_01_sfnt_off0000c765.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC765 14688 bytes
SHA-256: c1bc27a2edfe29eb8e49f349f12f5fc54f77912f152c5b2b3a35743c5a25d500
font_02_sfnt_off0000ec74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC74 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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