Malicious PDF — malware analysis report

Static analysis result for SHA-256 947d806dc5a33f2f…

MALICIOUS

PDF

76.5 KB Created: 2021-05-31 03:17:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: d2e9ccd98c9e42805d0d0d953da069ca SHA-1: 2e3424fbe891c8dbed2b00f13250972c00698612 SHA-256: 947d806dc5a33f2f81f89f2fad7e9b3ea046c1127e37e133f280f824e2160219
186 Risk Score

Malware Insights

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

The PDF contains numerous external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external links point towards an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://golowaki.ru/wb?keyword=air%20fryer%20recipes PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4403560/normal_603601ac47d98.pdfIn PDF document text
    • https://vixawesomuwevu.weebly.com/uploads/1/3/5/3/135387162/vijudipezopivav.pdfIn PDF document text
    • https://gojolukok.weebly.com/uploads/1/3/4/4/134455450/5838298.pdfIn PDF document text
    • https://voloxamofe.weebly.com/uploads/1/3/0/8/130874475/pebofe-dimemibuboxusum.pdfIn PDF document text
    • https://bijazebis.weebly.com/uploads/1/3/1/3/131382141/8e037f60fb35a36.pdfIn PDF document text
    • https://bosebozix.weebly.com/uploads/1/3/4/6/134601905/ketirosijuk.pdfIn PDF document text
    • https://nizosanaradeke.weebly.com/uploads/1/3/4/8/134856136/rolevefogebonawajebo.pdfIn PDF document text
    • https://tijezelaxupoki.weebly.com/uploads/1/3/5/3/135340387/nimetonenoxefal.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392209/normal_603daacf6e2e9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476294/normal_604c9ddceb30a.pdfIn PDF document text
    • https://fezakuji.weebly.com/uploads/1/3/4/4/134490841/bokijin_jagudulonudolax_ripuramar.pdfIn PDF document text
    • https://tekopazaxalar.weebly.com/uploads/1/3/4/3/134348639/2575959.pdfIn PDF document text
    • https://jedarixires.weebly.com/uploads/1/3/0/9/130969076/2082010.pdfIn PDF document text
    • https://dirifulezidume.weebly.com/uploads/1/3/2/7/132740871/5242639.pdfIn PDF document text
    • https://tariroviwobin.weebly.com/uploads/1/3/4/7/134715354/xuded.pdfIn PDF document text
    • https://rezosegog.weebly.com/uploads/1/3/2/8/132814067/bulisifude.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497666/normal_600a07cd3cef5.pdfIn PDF document text
    • https://sopazavevorud.weebly.com/uploads/1/3/4/3/134370644/rixamexolivibab_wigibipugo.pdfIn PDF document text
    • https://zijuwufe.weebly.com/uploads/1/3/7/5/137518410/kusavafetej.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452837/normal_604f766c1f13f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/8922f4db-7ec7-4066-8566-97c7a64e9e65/canon_canoscan_lide_25_driver_for_windows_10_64_bit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12484d2b-3ba0-4806-9c9b-30c575534e36/78881306992.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/58d961d1-7e7b-4977-a8a3-1ee65d6a9f5e/is_chloroform_available_in_market.pdfIn 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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eea4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEA4 4860 bytes
SHA-256: 2d0a296a25ddbbda08e18076e3f3de0eb092e36b50161f34d1591224be049991
font_01_sfnt_off0000ff52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF52 10604 bytes
SHA-256: 123cc3be2dbe09e793a19854205133b9455257f817b02fafada39e6bb6dec019