Malicious PDF — malware analysis report

Static analysis result for SHA-256 f059b1221cbe7641…

MALICIOUS

PDF

78.5 KB Created: 2021-03-29 02:24:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: fb5052c1dfe1a88fbf0668bab84ec64a SHA-1: db7f85d9fe8216282a630d2df1ff0e2dee3322de SHA-256: f059b1221cbe764165b8dfa62f72077131d329f65f810b03f1b9439bbdf07c77
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. The document body, though heavily obfuscated, contains keywords related to product issues, which could be used to trick users into clicking malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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 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://druttle.ru/strik?utm_term=samsung+syncmaster+p2770hd+won%2527t+turn+on PDF link annotation
    • http://xruhdfo.site/9371806235sm59g.pdfIn PDF document text
    • http://coolvdomaion.online/how_much_do_royal_bodyguards_get_paidcb2jv.pdfIn PDF document text
    • https://safalijig.weebly.com/uploads/1/3/1/0/131070993/vogulokelaninu.pdfIn PDF document text
    • http://support-copyrighthelpservice-about.com/yin_yoga_poses_for_throat_chakrawfzpj.pdfIn PDF document text
    • http://fafasun.iblogger.org/26618087398.pdfIn PDF document text
    • https://suxamoka.weebly.com/uploads/1/3/4/8/134876373/zakenogi.pdfIn PDF document text
    • https://fivarebaxuru.weebly.com/uploads/1/3/5/3/135326201/gumoti.pdfIn PDF document text
    • http://visanekis.iblogger.org/apology_email_template_sample.pdfIn PDF document text
    • https://cdn.sqhk.co/porodiwaten/FFlZCjd/flip_jump_stack_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/talokelom/ibzjhhh/17129166432.pdfIn PDF document text
    • https://cdn.sqhk.co/nowonipewo/chchbjd/tic_tac_toe_free_svg.pdfIn PDF document text
    • http://afracheat1.xyz/how_to_remove_a_thetford_cassette_toiletlktev.pdfIn PDF document text
    • https://sikowegapewabi.weebly.com/uploads/1/3/5/9/135975971/dibinebuzomana-zizedasol-weronu.pdfIn PDF document text
    • http://detonic-hypertonie.website/pages_to_use_for_blackout_poetry1fqk6.pdfIn PDF document text
    • https://pudabesipewoz.weebly.com/uploads/1/3/0/9/130969441/vites.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mepuzoxol.rf.gd/56051908836.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c0627ae-f098-43c8-9bfb-ab63e2a26b98/how_often_is_first_aid_training_required.pdfIn PDF document text
    • http://gasunerumep.rf.gd/36072526346.pdfIn PDF document text
    • https://aefb6378-f3ca-470a-b9d2-22936542d087.filesusr.com/ugd/fe129c_ae8c055b5b3b425ba27af5c3b679a30d.pdf?index=trueIn PDF document text
    • https://e50eee24-2d95-422d-8083-6f618d95927b.filesusr.com/ugd/594ae5_835f96fd3e38425c80527d7705a858a7.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/7915bb0e-c881-49c6-8942-36e066375d10/13939276730.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ca2bc29-5706-4ea6-b793-964ae2ffc765/harry_potter_game_2021_price.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f088.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF088 6140 bytes
SHA-256: ff7af6516329efc3f61ef3d1ca174108a0f5c5a0bd6415c04e1f5fdae104e262
font_01_sfnt_off0001056b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1056B 11424 bytes
SHA-256: d149fcda35c156eea183578e85b9085d592271db924f0ee6b8543d68c73e3a37

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