Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1c59eeda4ef237a…

MALICIOUS

PDF

76.8 KB Created: 2021-03-16 17:56:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 3d497754cd07b35c2c21a814dbe38cfc SHA-1: 5d9538aa34f7412845ed37f5fbed1c2a1c1dc351 SHA-256: e1c59eeda4ef237ab935d31a0d4f278f2ee0285a3a6f3752f28cd199aed66885
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 0.9997

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://botokaw.ru/wix?keyword=hamilton+beach+searing+grill+25361+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4476582/normal_60271a226ba73.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474978/normal_600910b67319f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492575/normal_5fd78181a1121.pdfIn PDF document text
    • http://hookup154.online/garmin_gns_430w_repairus95m.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387428/normal_603902d3d5dfa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380854/normal_603e3c95a1734.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469116/normal_6024b34daf838.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466161/normal_60450fc58ed5e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488317/normal_604acbf174b1f.pdfIn PDF document text
    • http://xepuxupipe.mywebcommunity.org/3600569451.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450907/normal_6001b7bbc9c3a.pdfIn PDF document text
    • http://lamanixumerad.mypressonline.com/98580021971.pdfIn PDF document text
    • http://collegegraduatecentraldating.com/what_does_the_different_colours_of_period_blood_meanvvuy2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://434dcbc4-7bd9-40fe-99bf-e102daebf961.filesusr.com/ugd/07ef24_6e83c99e6a5947d49f7b8ce997c18f30.pdf?index=trueIn PDF document text
    • https://7fad2989-91b8-457c-89bc-9a0e7aeef19f.filesusr.com/ugd/b03ff3_7e35d238c7c84f32bf37e8b730a784f8.pdf?index=trueIn PDF document text
    • https://98771922-91e4-4673-aa0d-7794f4435593.filesusr.com/ugd/b6aaa0_b4673648ea8f47bb83d4ec1e6e8fe977.pdf?index=trueIn PDF document text
    • http://gevejonitu.onlinewebshop.net/urine_full_examination_and_microscopic_examination.pdfIn PDF document text
    • https://1f571a09-6495-4108-bd1a-9715deae29b5.filesusr.com/ugd/b0bf26_5a85700f49564c9598341f6d6c13e8d3.pdf?index=trueIn PDF document text
    • http://suduxegowur.onlinewebshop.net/fire_and_ice_ski_movie_trailer.pdfIn PDF document text
    • https://07bd7893-a6ec-44d5-90fe-c719e602c0bd.filesusr.com/ugd/aafaff_cd57958d879f4997a200431676b03391.pdf?index=trueIn PDF document text
    • http://zejibanunepi.myartsonline.com/74052861776.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ebe5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBE5 5940 bytes
SHA-256: c73118090fd316e49535428aece0ef0e7264cb59dd24a58ce2718c855b20b77c
font_01_sfnt_off0000fff2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFF2 11100 bytes
SHA-256: 81857195c722dbf173a8445bcbd1867822b0bbdb826f8eeab5c4cb178b635be1

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