Malicious PDF — malware analysis report

Static analysis result for SHA-256 0df0c248794dad77…

MALICIOUS

PDF

89.3 KB Created: 2021-09-14 10:00:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: aa0fc2f232fba3a67f84be0460d72233 SHA-1: 28543436ca01b1909ca7fe286a6cbf37ef8b3a0e SHA-256: 0df0c248794dad7729bc4ff7b13ba235176648ee502d529cc9a740520b7685bb
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to various domains, many of which are identified as link farms on disposable hosting. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were directly extracted, the PDF structure and URL patterns suggest an attempt to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://rassadaspb.com/new/files/file/43487045816.pdf
    • http://kozelsk-adm.ru/files/uploads/files/nedovamojovev.pdf
    • https://rafaellopezehijo.com/upload/files/63019585032.pdf
    • http://tccsrl.org/userfiles/files/radotasaz.pdf
    • https://inchirieriavioane.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1613fbc2e8d26b---vowotoralomaremumip.pdf
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/cbc68q4u9qciniffgodd6n48h3/16501412339.pdf
    • https://savitravel.ro/ckfinder/userfiles/files/55281342799.pdf
    • http://nwatchonline.info/userfiles/file/xakeb.pdf
    • http://rbc-bezorgdiensten.nl/upload/penepunu.pdf
    • https://kuraniterbiye.com/resimler/files/40723027059.pdf
    • http://unseretochter.com/images/file/44597286501.pdf
    • http://tonyprins.nl/images/uploads/file/fexuwovisapaxidonivenaf.pdf
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/161351f92db8f6---wizedi.pdf
    • https://suavitinhtannha.net/upload/files/95584987308.pdf
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/161394b32114b3---49605721692.pdf
    • https://dispecom.com/cms_dispecom/sgi_userfiles/userfiles/files/xovidelejiripa.pdf
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/1613568b9d34fc---21858203448.pdf
    • http://greenworx.eu/images/uploads/files/najofefadogulenimadavasez.pdf
    • http://anabakorea.jp/userfiles/file/kesesapop.pdf
    • https://rolcsi-bau.hu/userfiles/files/29579396244.pdf
    • http://ericshartman.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/noluzikekakukawinubob.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b66fb107a9---gexuwoxezitokafivawab.pdf
    • https://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/3a957c3d4c8be934b321c078ac0653ac/kujitivazuferodi.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=where+to+watch+telugu+movies+for+free
    • 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_off0000f653.bin
4c7ee580f8774a12767db152cd3f04defed065479614afa628cbb9ea47388862
pdf-font-stream PDF embedded font (sfnt) at offset 0xF653 18320 bytes
font_01_sfnt_off000125f7.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x125F7 16792 bytes
font_02_sfnt_off00013e0e.bin
5806b0ba4967bade7cc1c3b77b1a16b407d2d626a6e9baccd87926f1d46647ae
pdf-font-stream PDF embedded font (sfnt) at offset 0x13E0E 10924 bytes