Malicious PDF — malware analysis report

Static analysis result for SHA-256 dabf9f16f3739883…

MALICIOUS

PDF

77.3 KB Created: 2021-03-30 04:08:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: c87b774af20a3942f1152ce7f6a3892b SHA-1: 1013a86b047f7713768b5e3be10c8c016081aee7 SHA-256: dabf9f16f373988300775e8b53038cf760a0dc630fcc6b731a093d91f609c15d
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://pelibifir.ru/strik?utm_term=total+flow+equation PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4401973/normal_5ff60fc559d55.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410962/normal_6037dcb8eb682.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/nigimul/whirlpool_duet_sport_washer_replacement_parts.pdfIn PDF document text
    • https://b354d503-40d1-4c97-84b4-bc0b16c12f35.filesusr.com/ugd/8c7d07_064520f4d251454c8887d505a9a05cb3.pdf?index=trueIn PDF document text
    • https://37523d11-79cf-4eb3-ada4-f05de57c71ee.filesusr.com/ugd/275374_e6470942d0c34218b5239d60e7d82f17.pdf?index=trueIn PDF document text
    • http://tulifal.onlinewebshop.net/bosarivevarusikoxuganor.pdfIn PDF document text
    • https://s3.amazonaws.com/suxuzubojut/lento_regreso_peter_handke.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc1b6f26-51cc-4e04-bbcf-674af97a54cc/32132414314.pdfIn PDF document text
    • https://29c5b005-6627-40e3-9da1-9f9d3dbc34dc.filesusr.com/ugd/7ad284_3ec01d4664b0410fa7ab6de0017d9b71.pdf?index=trueIn PDF document text
    • https://105d84dd-9b22-4355-af37-21382b2db671.filesusr.com/ugd/f4243a_bb89fbc1d4144fbc8aaa8b6c9de9d3fe.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gowebabuxogiro/canon_pixma_mg5320_printer_ink_cartridges.pdfIn PDF document text
    • https://89f68ddc-9f98-4e60-8afa-3e0ca6603e9e.filesusr.com/ugd/4725f1_d27145d98cf144758c8d0946d1dadd58.pdf?index=trueIn PDF document text
    • https://5c90cfa9-af55-48e2-9430-1f3580382729.filesusr.com/ugd/e2b09b_781e8ad6871445f79f5c922ed8f11e48.pdf?index=trueIn PDF document text
    • https://b133b025-67d1-4190-9e53-fbb99503dec2.filesusr.com/ugd/caf13f_42fb269acab24a3490ea597a1dccaebe.pdf?index=trueIn PDF document text
    • http://sakogabutal.onlinewebshop.net/affixes_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc8ad0c5-0cca-4b38-a9be-b0dc19318862/oxford_dictionary_of_medieval_history.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15513760-2a2c-4dfb-b41b-a83c6b1cdec3/60036013965.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d75dd51-8b01-4ecd-afcf-d2d5d450854a/2372151302.pdfIn PDF document text
    • https://6762652a-e869-40f3-960d-1446d4066230.filesusr.com/ugd/55e6b1_334aeaf5c73443d181326a884d5296e1.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 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_off0000f14b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF14B 4652 bytes
SHA-256: 71f62e2a573052098bee0b3e7409b87e677e83e6f8e888f3372a8c89661a15e3
font_01_sfnt_off00010150.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10150 11100 bytes
SHA-256: b2f5f3ef12848e4c870e0192dc0bed2397a02fbc6c3fb56294cc797ab1ed8fc5

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