Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b3413fe2624c8af…

MALICIOUS

PDF

80.8 KB Created: 2021-03-30 18:30:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: ad7ab29cb4f6635efd88b674453c1090 SHA-1: 99f8118bf908203981027f46ce835873ef5d2182 SHA-256: 3b3413fe2624c8af27938ad87cc8736de8e058546ade4a31fad1b3cf6c586de3
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9994

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://xajibur.ru/123?utm_term=2019+telugu+horror+movies PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4448535/normal_600f3dac90b43.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393625/normal_6062644be5993.pdfIn PDF document text
    • http://euromarket.pro/24871970134mfebk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485310/normal_5fe5774035d8b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383792/normal_5fd7be0bd1fd8.pdfIn PDF document text
    • https://cdn.sqhk.co/kosibowo/imCedid/76525000742.pdfIn PDF document text
    • https://cdn.sqhk.co/tavikalamo/jeAiijg/vogoterepupikusod.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473049/normal_6001021401bc6.pdfIn PDF document text
    • http://reawolt.online/3147481251716kvz.pdfIn PDF document text
    • http://es50off.pro/zoluzuxununekigusumeloseupvld.pdfIn PDF document text
    • https://cdn.sqhk.co/tosilura/NJiaX86/79953453387.pdfIn PDF document text
    • https://cdn.sqhk.co/gejupajo/ar8sgha/the_third_day_cast_daughters.pdfIn PDF document text
    • https://cdn.sqhk.co/salenasova/gga5jcb/bekon.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://surufutikexa.epizy.com/ron_larson_calculus_9th_edition_solutions.pdfIn PDF document text
    • https://cceb078e-1df6-42b0-9e12-359f30e42f1d.filesusr.com/ugd/e8506d_5fcda0f29f554619ab05fafcbaf9de6c.pdf?index=trueIn PDF document text
    • http://jelezok.epizy.com/algebra_1_workbook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66dfd4ca-d823-4624-a36f-681eb7b870fd/gonumadawegimugazilifugi.pdfIn PDF document text
    • http://bosovegiged.rf.gd/31670751299.pdfIn PDF document text
    • http://giduzorim.epizy.com/technical_report_title_page.pdfIn PDF document text
    • http://mivarotodu.epizy.com/ziloju.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53502308-f3c3-47d4-bda5-956dc2e6cb4f/pitobobutefapikexugemubad.pdfIn PDF document text
    • https://e3ba7771-1cf2-49b9-be81-d91832e8ed63.filesusr.com/ugd/bc9675_bede251892104018ab1cbd3ef3e97969.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0752124-d5be-4781-bf42-ab0ce776ed48/wunorapepekafunipi.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_off0000fc33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC33 5336 bytes
SHA-256: c4730d7e6dc0928510ad8fad44dc862be460251ef05da9877d20e5b0c66cbf29
font_01_sfnt_off00010e3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E3D 11252 bytes
SHA-256: 9749e6500e149c04edb41d8fd0edacfadede176913993819bdffab5265b64500

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