Malicious PDF — malware analysis report

Static analysis result for SHA-256 6eb7d4185448c7eb…

MALICIOUS

PDF

108.3 KB Created: 2021-09-06 04:19:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 3950c3ab504da00900096890137b681e SHA-1: ff7aacb2898a9dbc51cb5a34a226839dc9e3e7fd SHA-256: 6eb7d4185448c7eb9d9fddf8d1b8996b2abf5b5b6783c15332d7b2cbb78d50b8
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with several pointing to compromised CMS upload directories and disposable hosting domains, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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 http://jar-ted.pl/file/90244096534.pdf In PDF document text
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/e856e5c7d2ad9cc1f530abafe60791a8/womereta.pdfIn PDF document text
    • https://demircanticaret.com/userfiles/file/zewuwuwesi.pdfIn PDF document text
    • https://yziact.fr/wp-content/plugins/super-forms/uploads/php/files/9ctvnm3t5i2lnrm2m795ef2eti/wujirujikivifoxebipa.pdfIn PDF document text
    • https://eamenfaraz.com/cache/fck_files/file/dimotojibizageferib.pdfIn PDF document text
    • https://ctsgroups.asia/images/file/siluridimamuviluxezo.pdfIn PDF document text
    • http://studiobaldizzone.com/userfiles/files/kakusupunuk.pdfIn PDF document text
    • http://syuncyoku.jp/upload/file/mugurujaworexavopax.pdfIn PDF document text
    • http://king-pro.com/userfiles/files/47959854350.pdfIn PDF document text
    • http://argyleliquidations.com/userfiles/files/46281919530.pdfIn PDF document text
    • http://www.gunyagder.org.tr/wp-content/plugins/super-forms/uploads/php/files/ba9jkrt65dvrc4toslnl1f2jh4/33985012385.pdfIn PDF document text
    • http://doyen.cc/images/upload/File/mabanaxuga.pdfIn PDF document text
    • http://hillcountryawningsandsunscreens.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078abb4be965---48423831766.pdfIn PDF document text
    • https://ariconium.cz/webpagebuilder/ckfinder/userfiles/files/valagunemavobu.pdfIn PDF document text
    • http://geo-equipe.it/userfiles/files/dimefobapiwuwuvani.pdfIn PDF document text
    • http://livelyway.com/ckfinder/userfiles/files/nabibigotat.pdfIn PDF document text
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/160739072df44b---45767680644.pdfIn PDF document text
    • https://maconlux.lu/userfiles/files/48117364943.pdfIn PDF document text
    • http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607eaa807c263---25175184201.pdfIn PDF document text
    • https://www.apartamentselsllacs.com/wp-content/plugins/super-forms/uploads/php/files/rl9pu6h57gbu353gg5uii2d3li/75357742748.pdfIn PDF document text
    • https://hartwellcook.com/wp-content/plugins/super-forms/uploads/php/files/9b5795e175f323ee832fcde7dca4cc9c/95242132327.pdfIn PDF document text
    • http://brooklynsmokeshops.com/admin/images/file/rilasanopet.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=uchunguzi+wa+agano+jipya+pdfPDF 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_off000142f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x142F6 17548 bytes
SHA-256: 590b9ee6e966eae2b22ea20c941d5f059bf4cd1587df0f17bb3db6d4f6f98a33
font_01_sfnt_off00017124.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17124 10852 bytes
SHA-256: 0669180a230db1b897e6cb830f14035335181ca38062432d22ba50e4c12ff5f2
font_02_sfnt_off000189fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x189FD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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