Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a788787d0d1b858…

MALICIOUS

PDF

75.9 KB Created: 2021-06-09 14:36:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 94cb4d3e52591397f9671f6cd91c95fe SHA-1: 9a64940d76b6f2e1a9caf6532145d6d57e5f3a00 SHA-256: 0a788787d0d1b858edc81de661b6524e666440705293c723fd6a00b89e4f32b9
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 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://garglob.ru/pbw?utm_term=conceptual+physical+science+pdf+free PDF link annotation
    • https://ruxetire.weebly.com/uploads/1/3/1/3/131379726/757794.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462341/normal_5fcaeb3136474.pdfIn PDF document text
    • https://rilofope.weebly.com/uploads/1/3/4/6/134630674/6465889.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451941/normal_5ff086fa629a6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476416/normal_5fc8098fab06e.pdfIn PDF document text
    • https://semumivotuwebaz.weebly.com/uploads/1/3/4/3/134379403/xatexikakabi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448110/normal_600e0011cb4af.pdfIn PDF document text
    • https://zutomufafet.weebly.com/uploads/1/3/1/6/131607254/muzegosilemijesam.pdfIn PDF document text
    • https://togurekeve.weebly.com/uploads/1/3/4/0/134040335/e5bf2690defba5c.pdfIn PDF document text
    • https://pagapepekajarop.weebly.com/uploads/1/3/4/3/134307963/momudibu_fajazo_wawuvuvipolo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gosirata.pbworks.com/w/file/fetch/144708165/jolobutigovivif.pdfIn PDF document text
    • http://lorugaz.pbworks.com/f/xulimorumo.pdfIn PDF document text
    • http://zowonixepor.pbworks.com/f/cnidarian_diversity_polyps_worksheet_answers.pdfIn PDF document text
    • http://fesatisobif.pbworks.com/f/24454916809.pdfIn PDF document text
    • http://labidan.pbworks.com/w/file/fetch/144571317/mirurafal.pdfIn PDF document text
    • http://pifiloxema.pbworks.com/f/winrar_free_download_64_bit_windows_10_full_version.pdfIn PDF document text
    • http://xumamiz.pbworks.com/f/72996992819.pdfIn PDF document text
    • http://finebov.pbworks.com/f/nufawokumawotum.pdfIn PDF document text
    • http://vowujepojez.pbworks.com/w/file/fetch/144754974/pajokumiku.pdfIn PDF document text
    • http://redelaw.pbworks.com/w/file/fetch/144849867/convert_to_word_program.pdfIn PDF document text
    • http://ludagobef.pbworks.com/f/lg_tv_price_in_bd_2020.pdfIn PDF document text
    • http://jutopar.pbworks.com/w/file/fetch/144717732/susomilawov.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

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_off0000e9da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9DA 5248 bytes
SHA-256: 1c38d595dc2a44436210a6e2e81a032210c7caa09dc044d1ca7bf9c195e6ab9c
font_01_sfnt_off0000fbb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBB4 11232 bytes
SHA-256: b6399cd3040dd687aa933463095ccb0dd86aabe9e333c14684d157f1914d572f

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