Malicious PDF — malware analysis report

Static analysis result for SHA-256 9cdffb543d07f034…

MALICIOUS

PDF

67.2 KB Created: 2021-09-16 09:59:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 06700261239c14dc008f6e23307941fe SHA-1: d408e1140a2192576af39ab7f8b6eee74bdae9b0 SHA-256: 9cdffb543d07f034e4f97ddf0528b8fed11011055c036d2ff9e89f950ba6985a
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file is identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing lure. It contains numerous links to external websites, many of which appear to be compromised or disposable hosting, suggesting an attempt to redirect users to malicious content. The document body is heavily obfuscated, but the presence of embedded URLs and the overall structure strongly indicate a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 67 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://www.itidharamshala.in/images/uploads/files/jetosurebepa.pdf
    • http://www.primalegal.eu/wp-content/plugins/super-forms/uploads/php/files/dpcfta3irm0rsd090itkqdso10/norafokidep.pdf
    • https://10s317.com/uploads/files/202109041825512808.pdf
    • http://barrospizzadb.com/uploads/files/42975627817.pdf
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/cda1816783ad36ef97e7677c0ed7799c/muwisilegogimivipokubajon.pdf
    • http://nexxosrealty.com/userfiles/files/magejibuxopumomekigop.pdf
    • http://spadhotel.com/basefile/spadhotelcom/files/17077662425.pdf
    • http://hongdacable.com/d/files/zuwepafexunoguzom.pdf
    • http://195exim.com/datas/files/dugixobeti.pdf
    • https://betalinktech.com/blmedia/file/17408968955.pdf
    • http://hijoin.hu/editor_up/7328710499.pdf
    • https://atcotourismtravel.com/userfiles/file/kizivozawirotoxusonomuw.pdf
    • http://odessawa.com/userfiles/file/marebemoxoxiginuz.pdf
    • http://hankyunget.net/userData/board/file/522122237.pdf
    • https://nevjegyzek.eu/uploads/file/fuzozotivasaxev.pdf
    • https://harteron.ee/userfiles/file/pujafezamagezadesupovi.pdf
    • http://logistra.fr/ressource/site-image/files/nitigudapogona.pdf
    • http://soeurs-scjboran.fr/soeurs/upload/files/75687525261.pdf
    • https://lostsoulsmemorialnj.org/wp-content/plugins/super-forms/uploads/php/files/844edc8be55524b4f8fd5649fad1681b/41469437737.pdf
    • http://zxpgw.com/userfiles/file/56458248841.pdf
    • http://estatepie.com/files/userfiles/file/pinelufamifenida.pdf
    • http://dsacare.com/admin/uploads/file/kugabowafafaden.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=sweeper+%26+tools+apk+download
    • 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_off0000ae88.bin
e4fcb05248aa612119c71af802ec87bf7e09453705bc8dfe8c28cf8887fbc14c
pdf-font-stream PDF embedded font (sfnt) at offset 0xAE88 9612 bytes
font_01_sfnt_off0000c376.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xC376 16792 bytes
font_02_sfnt_off0000db88.bin
9c4024542103114b70fb1490d26a0a8e6b96fd26c226161f5280b9fcc4bd3fb6
pdf-font-stream PDF embedded font (sfnt) at offset 0xDB88 14560 bytes