Malicious PDF — malware analysis report

Static analysis result for SHA-256 0627ce4e2991825e…

MALICIOUS

PDF

111.6 KB Created: 2021-06-13 23:26:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 0deb472d2a82ac8f2d5058ba189d3ae7 SHA-1: c6dae1ee3301f17af989875ca7b0da9c51f465d3 SHA-256: 0627ce4e2991825e3e6b61bb9d686ba983d9ad283590a912c89f40834b752731
156 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable hosting, suggesting a link farm for phishing or malware distribution. The presence of 'pictures of horny mature women' in a URL parameter indicates a lure to attract unsuspecting users. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://infrive.ru/uplcv?utm_term=pictures+of+horny+mature+women PDF link annotation
    • https://jdbailbonds.com/wp-content/plugins/super-forms/uploads/php/files/a944da8dfa4acf1d96a4b037a54f07e1/zezuponoji.pdfIn PDF document text
    • https://anzmrrn.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607242ba2970f---zesativagezatefokag.pdfIn PDF document text
    • http://math-talk.kr/wp-content/plugins/super-forms/uploads/php/files/io04en43aippc206o8l37fiivd/jifugokimotubifofisiput.pdfIn PDF document text
    • https://sirikulsteel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aeb8e22ecb2---nowukad.pdfIn PDF document text
    • http://www.lauricedale.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160716d7dab5ac---wisotiwinegizobixadevisox.pdfIn PDF document text
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/160707f6c8f7d2---nonexikilaraziwijove.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/vo118pl2lapdpkdbncqjkt3tm7/70467016982.pdfIn PDF document text
    • https://www.aceitedeoliva.com/wp-content/plugins/super-forms/uploads/php/files/d62e541f6829b35daf919c75e939d749/69120474754.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/3e46b9df8be64ded5712d45f66f682d7/sasuvuvuzutov.pdfIn PDF document text
    • https://www.sir.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c32d5bc5de0---titomozaxemugofi.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160be772d5e063---mejefer.pdfIn PDF document text
    • http://pebyte.com/wp-content/plugins/super-forms/uploads/php/files/geki4ehj1kd939kkppsol8pf2v/vaboxagokivozofukovog.pdfIn PDF document text
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160992030cd9ea---59739942336.pdfIn PDF document text
    • http://bubblesoflove.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608d339364c8f---62525045963.pdfIn PDF document text
    • http://vistobrasil.net/uploads/file/vigisuzoji.pdfIn PDF document text
    • https://www.democratum.com/wp-content/plugins/super-forms/uploads/php/files/e4d0dd0afc6a15cc1a3575da61c6d86f/lapejimudukaba.pdfIn PDF document text
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/6d0160b19a180480bfc8e18ece7a3a4d/72146830952.pdfIn PDF document text
    • http://vimbark.sk/editor_uploads/files/4833868387.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000163d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x163D7 5284 bytes
SHA-256: 06963aed6a811d604a19e405fb57b18960e2f5a6f5edc61f3a47993de3cc4aaf
font_01_sfnt_off000175b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x175B2 6124 bytes
SHA-256: b388dbe1581020506c7ae236760a4eb831b5776da7a7f06160d2be54530fa78e
font_02_sfnt_off0001859a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1859A 12844 bytes
SHA-256: f326f169f1fbb1c2df5caaf7a2160384e10eae24774d333e2e5eaf14233e21b1