Malicious PDF — malware analysis report

Static analysis result for SHA-256 68b1545b48fe9a77…

MALICIOUS

PDF

77.5 KB Created: 2021-01-31 18:01:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: de4116f72c115e0d489869abcebe28b6 SHA-1: 4ccde5a70082bff7e5f9bf75f1d008a74da829de SHA-256: 68b1545b48fe9a77617248d706874b476966071f4830023e4a5c7639ba78d3e8
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 pointing to disposable domains and link farms, a common tactic for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious content, likely as part of a phishing campaign.

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
  • 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/123?utm_term=tea+party+guide+fire+emblem PDF link annotation
    • http://boldly-grow.com/8585111738166wlq.pdfIn PDF document text
    • http://talakam.space/ripawefezofaralupivodupwsup.pdfIn PDF document text
    • https://cdn.sqhk.co/zefafulolit/fB03G3m/38844679291.pdfIn PDF document text
    • https://cdn.sqhk.co/voduzetefir/Ziiheih/5821768829.pdfIn PDF document text
    • http://se-mrush.com/wikosudizasadevafudu0vu.pdfIn PDF document text
    • https://cdn.sqhk.co/kusewupudin/hqQgdif/lebavix.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393631/normal_5fe24b591e10a.pdfIn PDF document text
    • https://cdn.sqhk.co/vimewiki/OjegfI8/cross_stitch_kits_for_beginners_canada.pdfIn PDF document text
    • http://henrysavbr.site/689666103dbdbn.pdfIn PDF document text
    • https://cdn.sqhk.co/wobuwozavenu/4jghpbE/fexulebatejapuzubulela.pdfIn PDF document text
    • http://flowerport.store/bapevifojebufibedem9b0i.pdfIn PDF document text
    • http://tricitysikhs.com/call_blocker_app_download_for_ipad4dmfm.pdfIn PDF document text
    • http://magnitoli-2ekran.site/pathfinder_kingmaker_knife_master_vivisectionistuilic.pdfIn PDF document text
    • https://cdn.sqhk.co/feduvefas/2ghgjhh/6577668807.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/kubafezin/new_army_uniform_effective_date.pdfIn PDF document text
    • https://s3.amazonaws.com/zuvovoxigumuz/auto_tap_android_no_root_no_pc.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 6

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e5e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5E1 5040 bytes
SHA-256: 40c3c5ad8e8810c8744203c3bd815d94c348aac11b9d4a845e4e2ca9cb69689a
font_01_sfnt_off0000f70f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF70F 10484 bytes
SHA-256: badf462e358275837b5cff60bb6800e1102d5faa48feb3a811c2e06eed7bfdd3
font_02_sfnt_off00011ab2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AB2 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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