Malicious PDF — malware analysis report

Static analysis result for SHA-256 17442bba625722b6…

MALICIOUS

PDF

112.9 KB Created: 2021-08-17 03:28:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: f56ce34d745b0e55da641e4c90379a2a SHA-1: 9609712d90fc89daab5cea3e2b10462a1471818c SHA-256: 17442bba625722b6f1129150c0a3abaf9a00b91ff6409888b42d178fcda49dd7
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to compromised WordPress sites or disposable hosting, forming a link farm. The presence of a callback lure suggests a potential phishing or tech-support scam attempt, aiming to direct users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

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 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/00d3c4522721fb57892c09e89465094b/14750387361.pdf In PDF document text
    • http://tavernadelsnoguers.com/wp-content/plugins/super-forms/uploads/php/files/e5fc70d8ca391b270a65f413152fea44/67014705993.pdfIn PDF document text
    • https://sardavetri.it/userfiles/file/nafuxadu.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/160a44bbb6caaa---pebofisojeji.pdfIn PDF document text
    • http://ehomeforeclosure.org/images/file/35254458031.pdfIn PDF document text
    • http://grani-tonkogo-mira.ru/wp-content/plugins/super-forms/uploads/php/files/61275ce5b3d009d5cd41759c2025a2db/75743212616.pdfIn PDF document text
    • https://webtraffic.ch/wp-content/plugins/super-forms/uploads/php/files/mmrsdugtd1jm8r7qiljcced5pu/75051204130.pdfIn PDF document text
    • http://altinay-law.com/images/file/wesurufomotapafem.pdfIn PDF document text
    • http://marketingnews.fr/images/file/5950671182.pdfIn PDF document text
    • https://warsztatgdynia.pl/app/webroot/media/files/metez.pdfIn PDF document text
    • https://magatek.com/documents/file/41456612808.pdfIn PDF document text
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/472bb1c9bee85f0dac7e382bd783f4a4/lopolirul.pdfIn PDF document text
    • https://dungcuruamui.com/wp-content/plugins/super-forms/uploads/php/files/5mvea9k3m9hkap6b3232bnvn21/virabekiwav.pdfIn PDF document text
    • http://bafiti.com/sklep/userfiles/file/94640935633.pdfIn PDF document text
    • http://cooperclassof1970.com/clients/9656/File/bagupabujufifal.pdfIn PDF document text
    • https://hoovermaids.com/wp-content/plugins/super-forms/uploads/php/files/9bf0349f109ece91f10bebea0d5b35ed/5732441687.pdfIn PDF document text
    • https://groupburuemas2.com/contents//files/zowozanipuxiposikoxirinu.pdfIn PDF document text
    • http://velkoobchod-man.eu/ckfinder/userfiles/files/81725621120.pdfIn PDF document text
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/160a63ee765b87---dujixovisebitox.pdfIn PDF document text
    • https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a94b241e4ce---32138161492.pdfIn PDF document text
    • https://m-isc.com/userfiles/file/zekagu.pdfIn PDF document text
    • https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/07a56b7940ccd5e46f137c81acff462c/19454957423.pdfIn PDF document text
    • http://alphabodysupplements.com/newerac2c/userfiles/file/kiwemuje.pdfIn PDF document text
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a9e8cc66cbd---83320793298.pdfIn PDF document text
    • http://animationcoach.com/userfiles/file/69375346826.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=chapter+21+ap+world+history+outline+revolution+socialism+and+global+conflictPDF 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_off00014f51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14F51 17648 bytes
SHA-256: 5b921da220f56861316026a246c8e64bde497815b1cbaa0deed65b05638b74f4
font_01_sfnt_off00017d8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17D8C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000195a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x195A3 11776 bytes
SHA-256: e146221a68748eb56d0a61f0954f0f6e3586d4f5f165615b92107f9ae73eaa7d

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