Malicious PDF — malware analysis report

Static analysis result for SHA-256 70f6fb8d3d598dd1…

MALICIOUS

PDF

72.4 KB Created: 2021-03-06 07:04:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: e0c27442bfdd30fd74d1479e639cd39a SHA-1: e9b0ad6993730b21f418deea5a31fafac99d3a47 SHA-256: 70f6fb8d3d598dd1b5c0b8655c6d3654aa571ddb0e8e39306c364c55c9334de8
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://kuzutuzo.ru/123?utm_term=sportspower+rosemead+metal+swing+set+reviews PDF link annotation
    • http://votubuv.22web.org/impossible_quiz_1_answers_49.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486742/normal_6022473af0e1d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461249/normal_60230140dc1d1.pdfIn PDF document text
    • https://diwijavel.weebly.com/uploads/1/3/4/6/134691177/loxabevogetuw.pdfIn PDF document text
    • https://mazanotofubemiz.weebly.com/uploads/1/3/2/6/132681192/628f5df.pdfIn PDF document text
    • https://luwujapi.weebly.com/uploads/1/3/4/7/134751522/gedokexig.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385417/normal_5fea1e4ae27d9.pdfIn PDF document text
    • http://ctyr.ru/botunavemavuwowubitewifimhrc5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375690/normal_601e6a52a4ab0.pdfIn PDF document text
    • http://rukozhop-guide.com/saeco_odea_go_manuald4vk0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tibelobal.epizy.com/rampage_v_extreme_10_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a3cd86a-3c7f-4aa6-b784-fa8b303c4e2f/husqvarna_725ex_awd_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9bf6cf3a-c697-46e9-a668-1203395a0760/folaviduloze.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9907d99-7995-424e-96d0-c9f5ab1cf41a/devotion_paladin_5e_wikidot.pdfIn PDF document text
    • http://zenulasomizin.epizy.com/beats_by_dre_powerbeats_pro_earbuds.pdfIn PDF document text
    • http://noluduji.epizy.com/avast_antivirus_scanner.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d1078af-5670-4b88-8aff-d81c4d8071ee/cricut_expression_24_personal_electronic_cutter.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7feaf1bb-0325-46bb-84d6-379e37630f70/periwatenosazinitimule.pdfIn PDF document text
    • http://gasigigi.rf.gd/21913579842.pdfIn PDF document text
    • http://letozin.rf.gd/how_to_fix_oe_code_on_lg_washing_machine.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_off0000dd21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD21 5536 bytes
SHA-256: 4ab0547fb55807995aa7030319c484ca1817225fa8c6719e4b8b308c56071e56
font_01_sfnt_off0000eff2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFF2 10544 bytes
SHA-256: da84b10306529ccd21f06035c967168cc63ed8279bc3f1311de4f1a34978f23d

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