Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a6abf4f4747976d…

MALICIOUS

PDF

175.2 KB Created: 2021-03-14 01:04:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: a0bd636dbdc7f5abc483aa8f4e4571f2 SHA-1: 62a0f03410d5604dfbe58c83abb67dbba08e83d6 SHA-256: 0a6abf4f4747976d25c2ebfde40d801ff511d41804e964ca8810c681dddb76fd
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 0.9995

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://maypoin.ru/wix?keyword=pollock+elementary+school+supply+list PDF link annotation
    • https://wulafuxuzezam.weebly.com/uploads/1/3/2/3/132302924/6270190.pdfIn PDF document text
    • https://favesalaliba.weebly.com/uploads/1/3/1/3/131384568/jatefiwidum.pdfIn PDF document text
    • http://ketoxitigojaluk.sportsontheweb.net/65072791963.pdfIn PDF document text
    • https://zazivobonapi.weebly.com/uploads/1/3/2/6/132696398/kapoket_zavobamesowid.pdfIn PDF document text
    • http://1ux.site/29925623967l3tcw.pdfIn PDF document text
    • http://topukovatawosu.sportsontheweb.net/79355354042.pdfIn PDF document text
    • http://vodabutopidaru.getenjoyment.net/best_indian_romantic_novels_2020.pdfIn PDF document text
    • http://gesemalisezusa.iblogger.org/deled_assignment_front_page_format.pdfIn PDF document text
    • http://kitukotobov.medianewsonline.com/graphic_design_portfolio_samples.pdfIn PDF document text
    • https://vidulegu.weebly.com/uploads/1/3/4/8/134897898/rural-kakegabonobivir-mivijimunal-bamegasosi.pdfIn PDF document text
    • http://bapozuwemixad.22web.org/huggies_pull_ups_size_guide.pdfIn PDF document text
    • http://levantegroup.net/is_166_a_good_gre_scorezpg82.pdfIn PDF document text
    • http://sixesijilolun.mywebcommunity.org/vimejetufuwarokovinugezo.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/zonebon/prezi_business_templates_free.pdfIn PDF document text
    • https://s3.amazonaws.com/voxazedisula/56718301789.pdfIn PDF document text
    • https://s3.amazonaws.com/dorobukasawituw/what_is_the_best_toaster_oven_for_toast.pdfIn PDF document text
    • http://lafanibawonol.rf.gd/45051530237.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc411861-7c77-42d6-9d84-318432a751bf/libogugirarerebotukulage.pdfIn PDF document text
    • http://watavevolowun.epizy.com/43251978417.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ec3c0fe-85b0-4a3a-9cda-530462636da2/74829544952.pdfIn PDF document text
    • http://webidiwotew.epizy.com/8111934857.pdfIn PDF document text
    • https://s3.amazonaws.com/ragejufa/atomic_theory_short_information.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_off00027774.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x27774 5340 bytes
SHA-256: fead6ced29b6a4d80158825b9a009581af9664819cd06b19d8432e3446b80198
font_01_sfnt_off0002897a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2897A 11116 bytes
SHA-256: f5750794b903a40ff2eceaf54f43aa0319148462ec82163a9aa7a09cec1fd6e5

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