Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f5dc845d37b7f23…

MALICIOUS

PDF

72.5 KB Created: 2021-03-06 23:34:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 071e795e99f6798fd706c0caf1599125 SHA-1: b2f8acfec1aacaccbcd252b33b0e3d4f6b6f89b6 SHA-256: 0f5dc845d37b7f234e9c7638e4740874ee113e68c90607250743b62a1478b327
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://gimoguvi.ru/123?utm_term=draw+tite+brake+controller+wiring PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4420230/normal_5fdc2f4c761ba.pdfIn PDF document text
    • http://vuvodagedene.scienceontheweb.net/wulibox.pdfIn PDF document text
    • http://kelnoteres.xyz/xirilamuzekagaz6htnz.pdfIn PDF document text
    • http://repochka.site/chasing_mavericks_book0hdpf.pdfIn PDF document text
    • http://iranomics.com/nature_sound_message_tone_download8k8x6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392210/normal_601ecbadeb18c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460057/normal_5fcbd98b70348.pdfIn PDF document text
    • http://gufufisazikoja.iblogger.org/hello_neighbor_guide_basement.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bevakotus.rf.gd/rondo_furring_channel_installation_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/jazamerijekufol/wejiba.pdfIn PDF document text
    • https://59e5a08b-0d8d-455f-a3a7-35a3b781ab3e.filesusr.com/ugd/784815_b92a3c3a88bd4f70a50732701be2d7d8.pdf?index=trueIn PDF document text
    • https://3f9320ff-391d-49df-b192-c557e211a93c.filesusr.com/ugd/469aea_313beb203d864a4ab372d5f8925caa96.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/novipaliwid/que_es_clulas_falciformes_en_ingles.pdfIn PDF document text
    • https://s3.amazonaws.com/jifesu/agriculture_in_sub_saharan_africa.pdfIn PDF document text
    • https://2d841ef3-a248-4e6a-996b-2d54d6713fdd.filesusr.com/ugd/1decf9_1c340ebfdfe34cfaa0f2c96eae7460f2.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pipaneku/guidelines_esc_stemi.pdfIn PDF document text
    • https://22520ec4-2132-45a5-98b8-54db1b71d3ea.filesusr.com/ugd/b33b96_ad5a339ef93746dbaef73c619b502a38.pdf?index=trueIn PDF document text
    • http://jukasuxoseki.atwebpages.com/how_much_money_does_premiere_pro_cost.pdfIn PDF document text
    • https://aa514bbb-a96e-4bc9-8ff3-0ca2edd1104f.filesusr.com/ugd/3fc21f_64cf997e79034dca89d0c040df413cab.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_off0000dbd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBD6 5084 bytes
SHA-256: 3a3e48d732d7e52e38d65f4fc563b1c4aa02e4c35d0d659b7ac798649c806ef3
font_01_sfnt_off0000ed51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED51 11108 bytes
SHA-256: ecd483754b59197b52ada8f9d054eebf466f2c7e3b69d7081dae3719ab2fcbcb

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