Malicious PDF — malware analysis report

Static analysis result for SHA-256 d95501701eb1135b…

MALICIOUS

PDF

74.0 KB Created: 2021-06-27 00:02:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b5b70f293a5651e124d8939951136a97 SHA-1: c3242826d4589fbc79fb5c979eff383d26bd261e SHA-256: d95501701eb1135b0b8e57392b1eac7c05d31b9e1217e52e0630648cd248f1a0
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as containing malicious links and being part of a link farm hosted on compromised WordPress sites. The ML classifier and ClamAV also identified it as malicious. The document body is unreadable, but the presence of numerous links to potentially compromised domains suggests an attempt to redirect users to malicious content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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://evenimentecastel.ro/wp-content/plugins/super-forms/uploads/php/files/uhijjou8tih0e5c5fbg0kthkk5/sukonejimofavuged.pdf
    • https://www.crossfitparamaribo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2838c6865e---20632716821.pdf
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/nhe8302p2i8imsa3ndm2lv30sf/30789372363.pdf
    • http://aimic.com/userfiles/file/69867431268.pdf
    • https://pinotcar.com/wp-content/plugins/super-forms/uploads/php/files/126b41f6e62e56238fd9af6a2e24dc6c/34700380749.pdf
    • https://celovechurch.org/wp-content/plugins/super-forms/uploads/php/files/b42111b2ae3f1139f7bfc0b9d5a1f250/vevopopo.pdf
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ceb340384c---muguripokinojorinaxifilo.pdf
    • https://diphong.com/uploads/92008086751.pdf
    • http://shreejians.com/userfiles/file/98310461122.pdf
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f544492bf3---73097016218.pdf
    • http://anhbanglaw.com/userfiles/file/levaxemuzemeferagowige.pdf
    • https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/92d1e105076ee1c3e58fa2f9dfa7479e/debututujawezuve.pdf
    • https://www.sesc.com.ua/wp-content/plugins/super-forms/uploads/php/files/8or4pmuoq1gs4kjgjmo2sno741/redorobuvibekufozibum.pdf
    • http://www.jobsincrete.gr/images/_user_na/file/24547763229.pdf
    • https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/16075d95a483e4---lekamidejimen.pdf
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b52f5c0cd76---94675289497.pdf
    • https://sgdivorcelawyers.com/wp-content/plugins/super-forms/uploads/php/files/06095d2a52f4195e3903b25af20f022f/73250530174.pdf
    • https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/9a67957098d2e3647827b3b93694fd27/91316466937.pdf
    • http://shmountaineering.co.uk/wp-content/plugins/super-forms/uploads/php/files/sumefre2bg5pv8jkpnqct6ett2/fufowidenu.pdf
    • http://etcad.net/np/upfile/file/61460937727.pdf
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/c92da55e11f8c688189724d550dbe43a/22327142018.pdf
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cf28a7e7315---49001252444.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=natural+log+of+a+number
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c1d2.bin
d43cc4a1b3a080902b0e45c378fcb5e68207d536c74cb744a131d134ace661ab
pdf-font-stream PDF embedded font (sfnt) at offset 0xC1D2 16160 bytes
font_01_sfnt_off0000eb07.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEB07 16792 bytes
font_02_sfnt_off0001031e.bin
bec70c349c191dbcab5d83e47672552419286a2490c8e6a404c8b9fd951d1d9b
pdf-font-stream PDF embedded font (sfnt) at offset 0x1031E 10512 bytes