Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2da2a2932d15ad3…

MALICIOUS

PDF

103.7 KB Created: 2021-05-28 21:20:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5ca6ce79519b542b447eaf3a929200c0 SHA-1: cc43bd5e3e0fc09ca1b9ae299434b9c5ab4a2597 SHA-256: a2da2a2932d15ad3c41fe34762e930449b09e633b71aabe96051c61f07582b02
176 Risk Score

Malware Insights

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

The PDF file contains numerous links to external websites, many of which are hosted on compromised WordPress installations or disposable domains, indicating a link farm designed to distribute malicious content. The ClamAV detection and ML classifier strongly suggest this PDF is malicious, likely serving as a lure for phishing or malware downloads. No scripts were extracted, but the presence of external URIs and the overall structure point towards a malicious intent to redirect users to potentially harmful sites.

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://allytemp.ru/uplcv?utm_term=kotor+2+dark+side+companions+guide
    • http://suportti.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607787c4ee32e---53557860853.pdf
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608bac0c923b2---80819839281.pdf
    • https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16085737d58ac8---34465152318.pdf
    • https://orldoc.ch/wp-content/plugins/super-forms/uploads/php/files/4v0qfqcbjh4tm5gputjam9dpn5/16606254225.pdf
    • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609c7fe3c5b28---gapofukijason.pdf
    • https://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16072b033889bd---jorug.pdf
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/1609de714b2336---luzuf.pdf
    • https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/1894e01b228f73836297751a7a97befb/42270761117.pdf
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1606d031aeb78e---fuzuvokikimuludikanuxofa.pdf
    • https://burmesecatclub.nz/wp-content/plugins/super-forms/uploads/php/files/f30b04c1d932797c19fc3506551226b8/84183576953.pdf
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/14936d1445b31a62b85d20dad0ea375e/pixemolupamigoravifonuka.pdf
    • https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/om1npad2t7un8ejpl71lgjmnpj/31164159750.pdf
    • http://plenar.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1608d69a97fd12---zasonepomod.pdf
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b4f8a304f9---12364150143.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_off0001576d.bin
eee3f8c7b760b34f2a691ea95ee969779b455b63ce5d6a3dd19dd9d49ce097b0
pdf-font-stream PDF embedded font (sfnt) at offset 0x1576D 5528 bytes
font_01_sfnt_off00016a24.bin
40dd49850b03166aa258855aa8aec50a54a338ea88688b5960847bfafc1be434
pdf-font-stream PDF embedded font (sfnt) at offset 0x16A24 11708 bytes