Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9aed05f38e3ae71…

MALICIOUS

PDF

79.3 KB Created: 2021-03-05 08:24:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 4944d668872db644b8d4b2a2e687b284 SHA-1: 86340b65e8ad03f852dc9b0c87ba576e7b8a1fb3 SHA-256: e9aed05f38e3ae71a1af91cc8dbc79ae647647c02187b142faba909e6c9eed9c
186 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 6

  • 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.
  • 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://jacksth.ru/wix?keyword=backstage+pass+olivia+cunning+pdf+download PDF link annotation
    • https://bevabuje.weebly.com/uploads/1/3/4/8/134897483/xijofeb-zimixi-jalexujuwafud-bubemotabamovij.pdfIn PDF document text
    • https://givolejemaxo.weebly.com/uploads/1/3/5/3/135345859/fitex.pdfIn PDF document text
    • https://wetebofi.weebly.com/uploads/1/3/1/6/131608016/839950.pdfIn PDF document text
    • https://taxinureku.weebly.com/uploads/1/3/0/8/130814469/zimipopanalil-rapor.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459482/normal_5fcba239d4b4f.pdfIn PDF document text
    • http://ig-support-service.com/twilight_eclipse_full_movie_with_english_subtitles_watch_online_freerx722.pdfIn PDF document text
    • https://jezaxinadi.weebly.com/uploads/1/3/4/5/134597346/vijaje-kekidivomovotaf-segowo.pdfIn PDF document text
    • http://tuimag.ru/a_scanner_darkly_book_ending45u25.pdfIn PDF document text
    • https://rowopubogapog.weebly.com/uploads/1/3/4/2/134234702/borawagodiputazoreg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501229/normal_6041c7a03e066.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418777/normal_600ba3386a12b.pdfIn PDF document text
    • https://zisinifaja.weebly.com/uploads/1/3/4/5/134599776/gavotujezup.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489983/normal_5fdc68845b91d.pdfIn PDF document text
    • http://tranquils.space/50_shades_of_gray_film_wikidx3ft.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/6823b981-8fcb-41fe-9da3-22f36b7a4f72/can_a_small_oil_leak_be_fixed.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c99c56d3-dfe3-40a6-ae20-825a5fd4348d/dyson_cinetic_big_ball_animal_cheapest_price.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000104a5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x104A5 23216 bytes
SHA-256: 735e04d285007e137ecc01d7dcbd9eab9979c599df9ffc35f2e22d653968c3c2
font_00_sfnt_off0000d089.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD089 5492 bytes
SHA-256: 601f52dd2be592ddd24648f9062bdec9b342ef4a65ceee66910e310c35a83900
font_01_sfnt_off0000e36c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE36C 9628 bytes
SHA-256: c10d6092393bc1cc7490673b35ed08dcacaa0b6bdebab7bb2fb4b434b5f9df9f

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