Malicious PDF — malware analysis report

Static analysis result for SHA-256 1982095a840a4ff4…

MALICIOUS

PDF

76.3 KB Created: 2021-04-04 06:03:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: c6faef36f3bc61534829f2128a213098 SHA-1: 0946c38f84bf7ab76a84b05bcdd08ace94da6e9b SHA-256: 1982095a840a4ff47812075ae012be764f0231ffea73cace819981971d8c4e07
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://resalured.ru/strik?utm_term=how+to+watch+big+little+lies+for+free PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4449192/normal_605688ffd0435.pdfIn PDF document text
    • https://cdn.sqhk.co/wadupaxi/iPIYjg1/35508116676.pdfIn PDF document text
    • https://cdn.sqhk.co/kamavedes/cX3ygiW/22408933451.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453891/normal_5ffeb9fde3c50.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419437/normal_5fce74b5c2496.pdfIn PDF document text
    • https://cdn.sqhk.co/jasurisunav/CBijSgg/velozozujenimizutipagu.pdfIn PDF document text
    • https://cdn.sqhk.co/tugirujozi/cZjfsii/66733149399.pdfIn PDF document text
    • https://cdn.sqhk.co/kuwusemob/qCyRcJP/fdic_call_report_glossary.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/mogedozara/stanley_fatmax_box_beam_level_72.pdfIn PDF document text
    • https://387a498e-9551-4239-9507-3183ba214552.filesusr.com/ugd/cd403b_8532e8bed57447b8871d0248b23ad6aa.pdf?index=trueIn PDF document text
    • https://48e5b1ff-25fb-49a4-826b-3ad3f3a15688.filesusr.com/ugd/0d632a_a41ef0c49b284289bb4224431b227895.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bagokiko/bonjour_tristesse_song_english.pdfIn PDF document text
    • https://s3.amazonaws.com/nimuwet/mirinidovuxitakemifuv.pdfIn PDF document text
    • https://ef2e072a-e8a2-4438-804d-cc750be2e2f6.filesusr.com/ugd/6a22cb_8d5a3b7e611f4340b90f1b73b418974e.pdf?index=trueIn PDF document text
    • https://f405dec1-7f90-4f4c-a861-5286f67d0127.filesusr.com/ugd/ab922d_1201ce1ab7744eecb0f13c269dcf0e38.pdf?index=trueIn PDF document text
    • https://1f53f175-067f-4140-b001-f66bebc9855b.filesusr.com/ugd/c711d8_ca16db55d96243de9010cbaf43340c61.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/palevijuj/cognitive_behavioral_therapy_cbt_examples.pdfIn PDF document text
    • https://737c154f-ca75-4484-807d-9d5c19d76377.filesusr.com/ugd/7e84b7_1451f833c2304241a7fd4d952e24cf10.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_off0000ee14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE14 5336 bytes
SHA-256: 8dcc36e0f5208ec3b24a804948381964ea081d29ad7cf5e75592bb48980943dc
font_01_sfnt_off00010046.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10046 10528 bytes
SHA-256: 4d434996b62a942d07c774a85ae384077f3585ae41c5bf02fc772f99cdb295c7

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