Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c80ed9a16f69769…

MALICIOUS

PDF

73.3 KB Created: 2021-09-25 03:45:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d2106ce1dfc63bcc2b5c887bc60a75b6 SHA-1: d4021f58bdde8d16e06597c49e2ca6ec85fc79f6 SHA-256: 9c80ed9a16f69769228c6cd1415f15cfb133e543adcd4d2618ceea5739362134
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, many pointing to compromised websites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://coretry.ru/uplcv?utm_term=pyar+ishq+aur+mohabbat+full+movie+watch+online
    • http://montoaneli.com/ckfinder/files/78793506725.pdf
    • https://farmacieitaliane.com/documenti/file/94865113731.pdf
    • https://bike-accessories.supersites.gr/content/ckfinder/files/jonobugowotorugor.pdf
    • http://trongtinpc.com/luutru/files/bakupubalipeviwidufatizi.pdf
    • http://mmckno2010.zkosuchdol.info/files/93666667325.pdf
    • https://onecre.com/images/content/files/85827818339.pdf
    • https://gym-rectif.fr/ckfinder/userfiles/files/46231836984.pdf
    • https://millvalley.com/wysiwygfiles/file/rozudolatulazerujote.pdf
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/f4c4c8907c41ee0762c04de7766e5272/xoxolomowuposowada.pdf
    • https://pamukoglu.com/userfiles/file/91036745670.pdf
    • https://fibra-optica.ro/ckfinder/userfiles/files/lusizowilitet.pdf
    • https://siriusdynamics.com/assets/uploads/files/30179886571.pdf
    • http://budoprojekt.eu/obrazy/file/53110283715.pdf
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/935cbd311b40e3e026571ef516f73c79/50542687202.pdf
    • http://actinq.nl/upload/file/52471341049.pdf
    • https://livstyle.ro/home/livstyle/public_html/uploads/files/38074476578.pdf
    • https://yesilkoyluleriz.biz/resimler/files/zagefaguwivezeje.pdf
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/161490a9e368f3---19611720083.pdf
    • https://ivfnna.gr/wp-content/plugins/super-forms/uploads/php/files/fffcf763ebf4bf69a6e0327d5bd71357/41562641892.pdf
    • https://habibitoursegypt.com/ckfinder/userfiles/files/tulomazupowapotetadod.pdf
    • https://shreenathtechnologies.com/userfiles/file/22688076067.pdf
    • http://radtel-sport.pl/userfiles/file/lugetorurop.pdf
    • https://vayamcs.com/content_files/files/16682263647.pdf
    • https://girl0229960192.com/upload/users/files/vimokurasubezi.pdf
    • 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_off0000b5e2.bin
cff4e91ea4d1b2bdee487b0caa82bf60579b348ed3db7539145fd9ee348a72b7
pdf-font-stream PDF embedded font (sfnt) at offset 0xB5E2 18448 bytes
font_01_sfnt_off0000e4dc.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE4DC 16792 bytes
font_02_sfnt_off0000fcf3.bin
fd8d88e42888e0619a8c8f50f3a4bb663e232781363c366b38c031e67661691a
pdf-font-stream PDF embedded font (sfnt) at offset 0xFCF3 11256 bytes