Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9d6c0d54fabb64e…

MALICIOUS

PDF

85.6 KB Created: 2021-08-11 07:41:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f2500839ee5666937d8d1490e5610936 SHA-1: e854bf21d4a2355cec974e497281f48d047b6343 SHA-256: f9d6c0d54fabb64e733711316bfaaec021731fc21a654090e306ec3cc8121855
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to various domains, many of which are associated with compromised CMS uploads or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://mhs69indians.com/clients/864804/File/85427167005.pdf
    • http://frutapac.es/ckfinder/userfiles/files/gejogeliderifudomefilu.pdf
    • https://rmdschoolandcollege.com/wp-content/plugins/super-forms/uploads/php/files/25fc3c7bcb032a71ffc875ae763f9a4e/gujapaso.pdf
    • http://fedoro.ru/upload/file/91931433836.pdf
    • http://santeh.md/img/files/jisugafojidug.pdf
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1610056479d7f6---15808461618.pdf
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b11aeab611d---48792760626.pdf
    • http://xdata.pl/app/webroot/img/ckf/files/mujupadogadixigefumegad.pdf
    • https://festivalecolo.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a41f5e9d95f---37532685184.pdf
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/16079c1bd3b43b---xoxurasari.pdf
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c54dcf12df6---13676402265.pdf
    • http://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160865afab4b50---jasigulafulewixuzezab.pdf
    • https://getlovebooks.com/wp-content/plugins/super-forms/uploads/php/files/0901d681e3c9ac97121061189bc02665/nidotibi.pdf
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/ec24bad29a5709d031f6b9b997ea877c/kakajifutupoj.pdf
    • https://brod-plovdiv.com/images/88212729556.pdf
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160bead1651912---sosutiresevubi.pdf
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/160caba0502746---momowawuribulafurisi.pdf
    • http://tsg-edinstvo.ru/userfiles/file/20719104449.pdf
    • https://duext.com/wp-content/plugins/super-forms/uploads/php/files/a71c24df90f0a2835a66b551292851ca/demuli.pdf
    • http://kubabus.cz/novy-web/upload/file/piriwinojipudisukizo.pdf
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609279ab2615c---50215397382.pdf
    • http://hzzxtl.com/UploadFile/file/20210704061522211.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=folktale+worksheets+for+3rd+grade
    • 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_off0000ecd3.bin
4eade689e45a987785cb1c31a23de197fe81cb7124ba5091162fb80f8ebf88ed
pdf-font-stream PDF embedded font (sfnt) at offset 0xECD3 10764 bytes
font_01_sfnt_off000105af.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x105AF 16792 bytes
font_02_sfnt_off00011dc1.bin
e9b42c214727c5eed4bdd5e7d9918248488301854124deb5d8ee364b359a7543
pdf-font-stream PDF embedded font (sfnt) at offset 0x11DC1 16840 bytes