Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c3c8360a5cdb8c9…

MALICIOUS

PDF

78.3 KB Created: 2021-03-15 10:14:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 4042ae4285f733061ba4a67f401ffeeb SHA-1: 2f23e3536874c38eee8b174b4e6e950278d19a34 SHA-256: 3c3c8360a5cdb8c9dc446655bfef96b19a62b8bcc848c4eb80c9bce10f3c78e8
156 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 0.9998

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 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.
  • 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://jumiwimov.ru/123?utm_term=floating+action+bar+menu+android PDF link annotation
    • https://cdn.sqhk.co/gowalitusiwa/ehgFUji/yellow_finch_birdhouse_plans.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488574/normal_5ff59d0f4b082.pdfIn PDF document text
    • https://cdn.sqhk.co/mogizufofuj/gghNWQ1/86252378412.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366395/normal_5fde56e77ef16.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371244/normal_5fec25a59ccbc.pdfIn PDF document text
    • https://cdn.sqhk.co/lamiwifa/ehizhdt/multi-_multiple_accounts_app.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376125/normal_5fe3f21e46a90.pdfIn PDF document text
    • https://cdn.sqhk.co/fefowofuk/Y9jh9id/86820775034.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7a9b177-26f8-4381-90bf-8cbe1a24d229/is_warranty_forever_worth_it.pdfIn PDF document text
    • https://s3.amazonaws.com/pusolefosex/raduf.pdfIn PDF document text
    • https://s3.amazonaws.com/nasitevu/34696551353.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d2b7e4b-804a-4d1c-8f63-fcb49ca1a222/gisikemofepemogo.pdfIn PDF document text
    • https://s3.amazonaws.com/wuwabobujasivor/evil_dead_2_imdb_parents_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/divexikav/dead_space_apk_data_free.pdfIn PDF document text
    • https://b6c9d0de-81a1-4db9-ab7d-8a95af9e63d6.filesusr.com/ugd/b28ae2_8038f32e88bf45249526e05bbd5ae1a4.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/6499cb50-b866-4608-bf76-4374ad1f0277/why_are_the_lincoln_douglas_debates_important.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec678acb-9dcf-4fe9-852d-f3cb59a2cd01/95430676754.pdfIn PDF document text
    • https://36425c1f-c329-48aa-845d-1f8252cb45c8.filesusr.com/ugd/01d500_f1da38b3abc24807a3783c9b662ca285.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b56d4ad5-834e-4920-8a34-8463923958f7/dream_interpretation_saving_drowning_baby.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 4

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_off0000f5b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5B5 5176 bytes
SHA-256: f1e5386107922d95316c815e08b8dfaca53979ff9e68466df4b938c97f879198
font_01_sfnt_off00010739.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10739 10732 bytes
SHA-256: c8fa787486f2f1375ced800d1e5e6a360e9725d181eae95f5ac24a6ed08e646d

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