Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbddadd1b0cbda6b…

MALICIOUS

PDF

79.2 KB Created: 2021-03-16 23:47:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: f2f929359c3839147b53855b3b4bf0c0 SHA-1: d72db1cf649b4913e50572f5dba13c01c3adf02f SHA-256: bbddadd1b0cbda6b3608725329ed549a774ee42d557916a88d720369ee93e68c
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains a large number of external links, identified as a link farm. The ClamAV detection and ML classifier strongly indicate maliciousness, likely related to phishing or malware distribution. The primary function appears to be redirecting users to other potentially harmful content through the embedded URLs.

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
  • 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://seumenha.ru/wix?keyword=is+visible+light+more+dangerous+than+radio+waves PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4445864/normal_601bd6d5d4a37.pdfIn PDF document text
    • https://cdn.sqhk.co/tuseliwi/iejiGFa/trick_shots_fortnite.pdfIn PDF document text
    • https://cdn.sqhk.co/xesofosirija/Orhhgcd/nys_learner_s_permit_manual.pdfIn PDF document text
    • https://cdn.sqhk.co/buxifuludo/chd6hiA/teacher_class_planner_template.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414358/normal_5fda766e18ed1.pdfIn PDF document text
    • https://lolozodosut.weebly.com/uploads/1/3/1/6/131606575/187463.pdfIn PDF document text
    • http://thesalle.xyz/zerirgmks0.pdfIn PDF document text
    • https://nifixivenugoku.weebly.com/uploads/1/3/1/8/131856212/6af835b9.pdfIn PDF document text
    • http://instapriz.site/nfl_fantasy_appg008c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405430/normal_601467645477c.pdfIn PDF document text
    • https://cdn.sqhk.co/xusarukave/vhagdhh/93124132590.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410004/normal_601ddf411f9ad.pdfIn PDF document text
    • https://fisotewefupug.weebly.com/uploads/1/3/1/0/131071176/nerojejevabi.pdfIn PDF document text
    • http://newyearshop.site/used_car_checklist_redditp6eqb.pdfIn PDF document text
    • https://xipasole.weebly.com/uploads/1/3/4/8/134853136/461217.pdfIn PDF document text
    • https://cdn.sqhk.co/melipetoluf/ffeicnP/screen_recorder_with_audio_recording.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/jakujakula/xebaker.pdfIn PDF document text
    • https://s3.amazonaws.com/tulosa/google_chrome_offline_terbaru_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/gewisetug/65282255753.pdfIn PDF document text
    • https://s3.amazonaws.com/magapeguwabe/6558273385.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9E0 5352 bytes
SHA-256: f4af16675b5de4bf7e1b625c42bef2e338b57ccc0c5ce68e97b464f44923584d
font_01_sfnt_off0000fbf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBF3 10744 bytes
SHA-256: 167f8e3a98739b2297d02fa8cbd86cfd409c1852d51ea4ce8deefee6ba93fabd
font_02_sfnt_off000120d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120D9 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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