Malicious PDF — malware analysis report

Static analysis result for SHA-256 e51783f24a999dc6…

MALICIOUS

PDF

83.5 KB Created: 2021-04-07 02:47:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 269db13da7fc0c2b24252a110352189d SHA-1: b0f783ee7a520ca4f493c3469aaece0180297936 SHA-256: e51783f24a999dc6e00d88485a5f39f56ebc9d0f585e6731ed8c9bede93fb1f1
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 0.9998

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 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://nipisod.ru/award?keyword=spring+boot+annotations+pdf PDF link annotation
    • http://pasetbs.xyz/sanepigepigexodawovu2vnx4.pdfIn PDF document text
    • http://malespw.xyz/40119858836fdrpe.pdfIn PDF document text
    • http://zesamoa.online/aspose_convert_word_to_javanihsw.pdfIn PDF document text
    • https://cdn.sqhk.co/jojojidatun/0aqU5hh/50270458297.pdfIn PDF document text
    • http://kpupnov.pro/dante_paradiso_canto_6_summaryzkk77.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413564/normal_60291e701138e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454547/normal_60622a22d9658.pdfIn PDF document text
    • https://cdn.sqhk.co/patagarinixa/jjgcjcy/miranda_lambert_bluebird_in_my_heart_lyrics.pdfIn PDF document text
    • https://cdn.sqhk.co/buvaboda/g4Y5v3k/history_of_cancer_icd_9_code.pdfIn PDF document text
    • https://cdn.sqhk.co/pafevola/ieb5vgg/pioneer_smart_sync_support.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mitekavutoz.rf.gd/32463814733.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa4c7f46-44b0-4046-9908-0c4ba2d9545e/asrock_z170_pro4s.pdfIn PDF document text
    • https://2061f665-9309-41a6-981d-137229ee7e60.filesusr.com/ugd/eb2fe6_3a196e2a27a04307b8e9eafc48a4340b.pdf?index=trueIn PDF document text
    • https://ec451167-49e0-489e-a150-d7dc0ecf9264.filesusr.com/ugd/fe0276_70a7fae3e6b04739ac1dcf215a28e5e1.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a773562-1442-4bd1-a32d-d5ce3fde9716/27177834842.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b46be57e-84cf-4567-8754-4bc5d3e7d92c/mowerijexar.pdfIn PDF document text
    • https://d2d87fd5-5f4d-49aa-ab3c-2263ce4b5d22.filesusr.com/ugd/9169d2_2cec0ec66c8242728c4ac4dee3779549.pdf?index=trueIn PDF document text
    • http://zodamexuzawafi.epizy.com/31565453287.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

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_off0000f0cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0CF 5420 bytes
SHA-256: 8b9934c22af66e362f3a79a17b9b7669d0679a8ecdd3bcb04f515f9313eb8a63
font_01_sfnt_off00010342.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10342 11408 bytes
SHA-256: 6e6b35dcf379019d8efe64a89aa146d743bfa8aafa1b17e34959fcbaa6a67958
font_02_sfnt_off00012a6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A6A 16488 bytes
SHA-256: 74b4830f0cdd944423868677a74a3b21cefb8a46874f59b320a6189dbc0f2137

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