Malicious PDF — malware analysis report

Static analysis result for SHA-256 dab5c0126c94dd19…

MALICIOUS

PDF

85.6 KB Created: 2021-07-04 00:06:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9b82fe46efda2ac6966aca6b7b8f42ae SHA-1: bf7d1ef317a09b23aff5a9b142b4651dd4516d29 SHA-256: dab5c0126c94dd19f8c1b56faec1b05bb66e9ce1b10300ca588bd3216f1e5417
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by a machine learning classifier and ClamAV. It contains numerous links pointing to compromised WordPress upload directories and disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The presence of urgency language in the document body, though not fully extracted, further supports a phishing or lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 7

  • 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.
  • 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://richmediahouse.com/admin/uploads/file/29639532585.pdf
    • http://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/160855e8e378e3---47974395451.pdf
    • https://www.hinogas.com/wp-content/plugins/super-forms/uploads/php/files/5ail0ug4fob4ihe0fa3ool2q74/69556435407.pdf
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/rpt709cask3t96mn8kn43rniu4/wusowegox.pdf
    • https://admonks.ru/wp-content/plugins/super-forms/uploads/php/files/e6bd0cf8706f3b41fb07de57e41765d9/77630481510.pdf
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/160dae310bf8c9---82249071335.pdf
    • http://mav-auto.ru/images/file/39828915656.pdf
    • https://miet.hu/kepek/71405842189.pdf
    • https://jfefood.com/wp-content/plugins/super-forms/uploads/php/files/ff19e4afd64f60f5bd955c29f80916c9/lanopemazum.pdf
    • http://currycornersugarland.com/admin/images/file/disowugurinuwunag.pdf
    • https://path.mn/userfiles/files/27377116856.pdf
    • http://misosmile.com/upload/editor/files/xabukekupajorolikukoxiz.pdf
    • http://carszana.com/image/upload/File/zavenudiregawixokuv.pdf
    • http://karthikeyanjayaram.com/userfiles/file/vafidumiposuvusegipo.pdf
    • http://urgentcarepb.net/userfiles/file/93242041315.pdf
    • http://japan-railpass.info/images/blog//file/misodilo.pdf
    • https://dimensioninteractive.com/WYSIWYGImage/file/21709179575.pdf
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/160de3b092e25d---rajanake.pdf
    • http://www.edgartownschool.org/uploads/files/fidiwelis.pdf
    • https://zweiund40.com/wp-content/plugins/super-forms/uploads/php/files/emg4p4ide7maf5ocrgaem4bd70/6716890937.pdf
    • https://kalyna.ua/sites/default/files/userfiles/file/mujesil.pdf
    • https://askopenko.com/wp-content/plugins/super-forms/uploads/php/files/f2d7e1717834211e6e9b2e8a898beaa4/sofokawanizegifa.pdf
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/lbe2c86npc05cebp30doq0dh2t/92207135378.pdf
    • https://www.reflectionuk.com/wp-content/plugins/super-forms/uploads/php/files/8ao0v0j2603o3efga23t7vkcsb/wovebir.pdf
    • http://provia-events.de/pics/fotos/1/file/vatovo.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=can+you+have+a+smear+with+a+coil
    • 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_off0000eafc.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEAFC 16792 bytes
font_01_sfnt_off0001030e.bin
0b20f6accbeb4190328f71f2566dfee53427fcddb0a187c655662725bb0393dc
pdf-font-stream PDF embedded font (sfnt) at offset 0x1030E 17188 bytes
font_02_sfnt_off00012fd9.bin
f4e967ca26c2e99698c1c7df870eddb48b500517693e291e3de037efc9258f67
pdf-font-stream PDF embedded font (sfnt) at offset 0x12FD9 10892 bytes