Malicious PDF — malware analysis report

Static analysis result for SHA-256 96b55b41a277b71c…

MALICIOUS

PDF

73.0 KB Created: 2021-02-13 14:18:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 207e1a696c0650e4cc347be0b0d4aecc SHA-1: fa3f6229c4dc9627f1513b708366511eac78cfe1 SHA-256: 96b55b41a277b71cafcef353c390b8edc9d21c0fd86028dffb8dc4665cd73e50
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://bologen.ru/123?utm_term=springtown+middle+school+website PDF link annotation
    • https://pijawofixogut.weebly.com/uploads/1/3/4/0/134017865/sibujafa.pdfIn PDF document text
    • https://cdn.sqhk.co/bimepefav/eggcX65/cyber_fighters_legends_of_shadow_battle.pdfIn PDF document text
    • https://cdn.sqhk.co/gujuvizaja/jfhjheA/73908695685.pdfIn PDF document text
    • https://nekusudowup.weebly.com/uploads/1/3/5/3/135315851/4974389.pdfIn PDF document text
    • https://fezekisovo.weebly.com/uploads/1/3/4/6/134661064/tawopa.pdfIn PDF document text
    • https://cdn.sqhk.co/kagaxavog/mA1ihge/southwold_maize_maze_discount_code.pdfIn PDF document text
    • https://cdn.sqhk.co/pokemazikera/ZjgCKic/x-_shot_water_gun_walmart.pdfIn PDF document text
    • https://cdn.sqhk.co/jebavimot/ijcsjj3/65091610020.pdfIn PDF document text
    • https://figiroxofidun.weebly.com/uploads/1/3/0/7/130740151/4618604.pdfIn PDF document text
    • https://wumaluruporemad.weebly.com/uploads/1/3/0/9/130969386/daxovimurijuxomamuw.pdfIn PDF document text
    • https://cdn.sqhk.co/potiribuwuf/jfoeAM7/ball_resurrection_level_10.pdfIn PDF document text
    • https://cdn.sqhk.co/zolewiko/bDnpIfj/78536187965.pdfIn PDF document text
    • https://cdn.sqhk.co/vefoveted/cibvPid/leo_and_tiger_woman.pdfIn PDF document text
    • https://kezofufilulo.weebly.com/uploads/1/3/4/4/134488682/a95139b8a8f9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413361/normal_5fe5a68b4b7eb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416150/normal_5fe73fd453ba6.pdfIn PDF document text
    • https://cdn.sqhk.co/kulukopupiw/ifjc6YC/54252755201.pdfIn PDF document text
    • https://perufagumitaxa.weebly.com/uploads/1/3/0/7/130738779/3626441.pdfIn PDF document text
    • https://cdn.sqhk.co/fekawifen/fgdghge/swamp_thing_1982_imdb.pdfIn PDF document text
    • https://gadikidaju.weebly.com/uploads/1/3/1/3/131379663/6370635.pdfIn PDF document text
    • https://cdn.sqhk.co/guwuweri/W5hjoIL/10947422028.pdfIn PDF document text
    • https://cdn.sqhk.co/jevamivuvugi/gn7gjO2/smart_class_5_english.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491723/normal_5fff304359db7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000e00f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE00F 5612 bytes
SHA-256: f73011bdedecd138ce5ba7fe76b5911e207b00743cb6f52de159b5ddf868e4a2
font_01_sfnt_off0000f309.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF309 10440 bytes
SHA-256: 804099dc482c3bf26f587e6cda0d350b75b1a8aac48dc5585776d68f10561471

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