Malicious PDF — malware analysis report

Static analysis result for SHA-256 badc0f6296b186f5…

MALICIOUS

PDF

86.7 KB Created: 2021-08-06 12:10:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c56277f23aface98643f4c168aaa05f1 SHA-1: 74febb33f775c400a893b484686dbcdd7440cffe SHA-256: badc0f6296b186f50e05ab3ac684ffe15be3b3a08c24d8b28c960d32615b7730
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, with many embedded URLs pointing to websites hosted on compromised CMS platforms, suggesting a phishing or malware distribution scheme. The document body is heavily obfuscated and appears to contain metadata rather than user-readable content.

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://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/160b619da193bd---51743343216.pdf
    • http://klefmarken.se/upload/file/furexiruzokafe.pdf
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160be794b43718---14928027808.pdf
    • https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/160778148af0a1---vomitalulaxofa.pdf
    • http://bainihu.com/upfiles/editor/files/mugaxoderugazekigaj.pdf
    • http://donauwell.at/userfiles/file/kumetugakajutosurawutod.pdf
    • http://n2nnetworks.com/files/others/raxijabulavosifawomeberis.pdf
    • https://gmnavarra.es/ckeditor/files/72020198593.pdf
    • http://pomodorolennep.de/gfx/userfiles/files/49169993088.pdf
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/16105543cd2638---bujud.pdf
    • http://airholic.com/UpFiles/WebEditorFiles/file/88972549052.pdf
    • https://dpt-mh.com/uploads/news/files/faxebewefejilev.pdf
    • http://saovietgroup.com/upload/FCK/file/wamipozogiv.pdf
    • http://littlepearlbooks.in/data/eimages/file/93573713870.pdf
    • https://fallsplat.se/file/vusefojavajonutituk.pdf
    • https://sinhadventure.com/uploads/file/korigopupopimo.pdf
    • http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b0c5f1b69d3---5467674978.pdf
    • http://sarkanyhajo.hu/files/file/xoxijot.pdf
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fdfa53e0546---bepovofesaxug.pdf
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/4tc2rqab069cmjeki50dj71jm1/mezex.pdf
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160903678b0636---piwebilikelez.pdf
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c417494906e---tozutotipadagiguzedumikul.pdf
    • https://www.nosolodespedidas.es/wp-content/plugins/formcraft/file-upload/server/content/files/1606ef381cc336---pepawop.pdf
    • http://georgefamilyreunion.org/clients/86186/File/99501221437.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=experta+en+bodas+online+latino+hd
    • 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_off0000ed15.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xED15 16792 bytes
font_01_sfnt_off0001052c.bin
10315a51759e8cea7d9a2e9d8b6483b26523a3bc1cf581e68842355c2911d916
pdf-font-stream PDF embedded font (sfnt) at offset 0x1052C 10712 bytes
font_02_sfnt_off00011d6a.bin
12f2492027437cc916be80abf7a7f44b9c2279f58d2194529993664b577bf38a
pdf-font-stream PDF embedded font (sfnt) at offset 0x11D6A 17916 bytes