Malicious PDF — malware analysis report

Static analysis result for SHA-256 a013853829bc7f38…

MALICIOUS

PDF

72.7 KB Created: 2021-05-11 11:16:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5f4870418d9f21e34d2bc06611721afd SHA-1: 2a3d1e7a426b497361356538818c0731725156c3 SHA-256: a013853829bc7f384e8e536e7dc6b19925ed1b25c75a8fc1fac500041eded651
176 Risk Score

Malware Insights

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

This PDF document is classified as malicious, likely a phishing lure disguised as an antivirus comparison. It contains numerous links pointing to compromised WordPress sites and IP addresses, suggesting an attempt to redirect users to malicious content or downloads. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://crysiq.ru/uplcv?utm_term=free+antivirus+performance+comparison
    • http://www.photobreak.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607003acd8535---kutitipepu.pdf
    • http://ural-resyrs.ru/data/file/wagodupi.pdf
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c81986fb37---46767534511.pdf
    • http://suamayin.biz/userfiles/file/33125478928.pdf
    • https://www.letspassdriving.co.uk/wp-content/plugins/super-forms/uploads/php/files/mson7jqni6v8pn4okeh1gm986t/xofogaduwijesujasox.pdf
    • http://objetivovender.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079ddbbc49ac---27229243584.pdf
    • https://abe-rdc.com/userfiles/file/17735137672.pdf
    • https://bonpetsupply.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bd22b0bb6d---fenuwuwunerogukekela.pdf
    • https://hcs1000.org/wp-content/plugins/super-forms/uploads/php/files/2d2ae4a217da1ccc471e2e2158cf81a4/xaxew.pdf
    • http://albino-pitti.com/pub_img/file/wumarokezafukenejum.pdf
    • https://www.wikiwebagency.it/wp-content/plugins/super-forms/uploads/php/files/6f15b53000d4fb8cb3930ed96aa2a95f/2409270909.pdf
    • https://laihouston.com/wp-content/plugins/super-forms/uploads/php/files/cec3ab411e1fc57326cad58fff8d5f2b/28822295680.pdf
    • http://purpledoorchurch.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084261916bd7---3123513112.pdf
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608829bfe596f---44346969151.pdf
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082bc226cdff---59267220895.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df84.bin
55d7c123055bc6f4c75aca2ba7f1a12295a8f510fa750e7259691755a99b54c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDF84 5144 bytes
font_01_sfnt_off0000f100.bin
a428eec5f09593645f7ab291497ae39f8ae0f835bf54ea5f38490bc3cf0611d8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF100 10428 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.