Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7c8e317c0d14cbe…

MALICIOUS

PDF

81.4 KB Created: 2021-04-24 13:49:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: cfb2fc4415eb89f85957cc19cff3c65c SHA-1: dd2bc053d60a376d76b964e49fcaaa93f9f169d8 SHA-256: b7c8e317c0d14cbe2bad4834ab7408cba55257485ef5876d86ab4903994f15e9
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 0.9997

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://pelibifir.ru/strik?utm_term=chartered+financial+analyst+salary+london PDF link annotation
    • http://xtreme-sport.ru/rental_lease_carpet_cleaningqlxpj.pdfIn PDF document text
    • http://yewes.fun/costanoan_tribe_information21p5m.pdfIn PDF document text
    • http://repair-telefonov.ru/mapas_cognitivos_ejemplos2cwnq.pdfIn PDF document text
    • https://cdn.sqhk.co/woselukafo/jvhcAja/18616085473.pdfIn PDF document text
    • https://cdn.sqhk.co/dejowipapoli/apeVjft/55097960373.pdfIn PDF document text
    • http://timurberg.ru/prioritisation_and_delegation_in_nursingulab6.pdfIn PDF document text
    • http://openplafond.xyz/4756992100mspyh.pdfIn PDF document text
    • https://cdn.sqhk.co/sebixodof/NjejhiJ/65088206165.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jujojomojemiz/26832048547.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71d91ae6-5318-4df6-acec-6a84483f055f/madibolip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5269d9a4-a2e2-49e1-9b93-05348827eb02/33522630119.pdfIn PDF document text
    • https://7605c768-a471-4169-85a9-0dab509fd250.filesusr.com/ugd/20ab23_f92d6bd744de420ea3cdd1482ae084eb.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e24f3d20-9be7-4149-9b47-68af09cd22a9/36658309555.pdfIn PDF document text
    • https://7ec9ed57-df89-401a-953b-45744c150cee.filesusr.com/ugd/6e3131_732bc8349853440dbfb71232b2460179.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wutezigojuxi/xoxisapagumerodojeve.pdfIn PDF document text
    • https://s3.amazonaws.com/fujadabez/pobafiji.pdfIn PDF document text
    • https://1e438cd7-6f3b-42ac-a97b-d13a75fa135b.filesusr.com/ugd/0c268c_b6723f5fec45414cb095f5b8c656ef82.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d92c460d-028f-46d6-aa17-2043ba95997e/lajojesenatojix.pdfIn PDF document text
    • https://fc06435f-e709-4c80-b59d-96fa470c1a13.filesusr.com/ugd/bdc04d_ca259f8aa6564a76a8327b1ad32311c6.pdf?index=trueIn PDF document text
    • https://459fb65c-52af-4c88-885a-43a44fbeaf25.filesusr.com/ugd/6a7407_f6d1326b36b149899dbe5459601c47c8.pdf?index=trueIn 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 2

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_off0000ff99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF99 5116 bytes
SHA-256: db5a23e2a9c532c75a0f8e72e2ee9e307134fd130f55c464b311738b7cc8a18f
font_01_sfnt_off000110ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110FF 11464 bytes
SHA-256: 5057b53264ff70a3443ea877b54a9058f9859b33bb032374018f80e1067baf4f

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