Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ea694c7c4e2baec…

MALICIOUS

PDF

70.2 KB Created: 2020-12-17 22:28:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: ced98c119e6e0a226a7149bbaee126f4 SHA-1: 15ecfa6f70e86a20c38ad99874dafa192bc89d7b SHA-256: 7ea694c7c4e2baec3973c2461deab5064880c08f800b57215dce248875818ba2
184 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, specifically identified by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The document body, though heavily obfuscated, contains text related to 'Skyrim safe storage thieves guild', likely a lure to entice clicks on the malicious URLs. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to phish credentials or deliver further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://ggtraff.ru/strik?utm_term=skyrim+safe+storage+thieves+guild In PDF document text
    • https://cdn-cms.f-static.net/uploads/4413370/normal_5f979d83af60f.pdfIn PDF document text
    • https://nudopimiga.weebly.com/uploads/1/3/1/0/131070212/c685a3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367312/normal_5fb47d1e23222.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425933/normal_5fa3859d1b245.pdfIn PDF document text
    • https://nukofagola.weebly.com/uploads/1/3/4/8/134883999/gojerak.pdfIn PDF document text
    • https://fategebedabeno.weebly.com/uploads/1/3/4/7/134718848/lanezo_xusuxuguwikati_raroviz.pdfIn PDF document text
    • https://kakijukiwobak.weebly.com/uploads/1/3/4/3/134322026/8830658.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455179/normal_5fcce4034c031.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368747/normal_5f8b49da96257.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/salosibejodod/kegunexuzutefivik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c10b5df-168c-47ed-9212-be4e304fb036/9816138482.pdfIn PDF document text
    • https://s3.amazonaws.com/sefipa/dreamsky_auto_time_set_alarm_clock_manual.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdef613485235c868a6074/1606283105964/vefezowewuwuwoxalibemev.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/467c2928-ae8c-40ab-909d-3390f5703594/ato_z_mp3_song.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdfe613f75b166439b5de3/1606286945993/akashic_records_of_bastard_magic_instructor_manga_volume_7.pdfIn PDF document text
    • https://s3.amazonaws.com/badodemebo/vilujojituzudo.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_off0000d654.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD654 5652 bytes
SHA-256: f372a6716d414c659b1de78f08ce84c6cc61b2137412d28d8cdf912214a6dae0
font_01_sfnt_off0000e96e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE96E 10124 bytes
SHA-256: a54b1a142926c208d19a3c5ec3eef6fc92ed0929c21b0391a996826f14076329

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