Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5f8d9ba069a1c8a…

MALICIOUS

PDF

72.5 KB Created: 2021-03-01 17:02:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: a016e4658f76a82fc922939030ad2a71 SHA-1: 94e4954b2d37046a554dcffe37ef939f18532d0a SHA-256: a5f8d9ba069a1c8aecbc33eaadd9754456414c35c5366474472cbc77ac875ff9
96 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 external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://lozipotod.ru/strik?utm_term=rapid+city+central+high+school+basketball+schedule PDF link annotation
    • http://wssummer.space/no_equipment_bodybuilding_workoutkmqqb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4497358/normal_5fdd3df45e10a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452171/normal_5ff15a3c962b8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461234/normal_5fdbe68f81848.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/fedojigudaj/66191085559.pdfIn PDF document text
    • https://s3.amazonaws.com/zamuriza/texas_chainsaw_massacre_2013_parents_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/woxojuxafopuv/what_is_a_sacrifice_of_thanksgiving_in_the_bible.pdfIn PDF document text
    • http://vedewujesog.rf.gd/adobe_photoshop_cs5_64_bit.pdfIn PDF document text
    • https://s3.amazonaws.com/jijari/great_writing_4_4th_edition_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/buwosevax/rimoruzumodaf.pdfIn PDF document text
    • https://s3.amazonaws.com/gozilum/how_to_change_the_battery_in_a_2016_toyota_corolla_key.pdfIn PDF document text
    • https://s3.amazonaws.com/liguwubore/55473097514.pdfIn PDF document text
    • https://s3.amazonaws.com/zarusegibitumet/63759478385.pdfIn PDF document text
    • https://s3.amazonaws.com/jajoxulabojaso/wowhead_druid_guide_classic.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_off0000dc2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC2D 5648 bytes
SHA-256: eabcd16e3580536737faebbd75f7c69794a56ff25722e80011026ac004d08c72
font_01_sfnt_off0000ef6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF6A 10832 bytes
SHA-256: 130ba1f2528c3eed92b28eb6554e50514319e69360054c90bd43e6102148be50

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