Malicious PDF — malware analysis report

Static analysis result for SHA-256 bade41958bd9ac7d…

MALICIOUS

PDF

90.9 KB Created: 2021-04-23 11:06:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 165e0dff850fb0ac95b5d3bf274a1dbc SHA-1: 72d96c923ec25e8f5875248db35aa2ab536b9969 SHA-256: bade41958bd9ac7d86ed02b53858bd30ec802319209507ff00ad3dcd52003766
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a significant number of external links, as indicated by the PDF_SEO_LINK_FARM heuristic. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution via these links. The document body is heavily obfuscated and unreadable, providing no further context on the specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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://baarspo.ru/strik?utm_term=pax+3+vs+davinci+iq PDF link annotation
    • http://dajekubawanumef.iblogger.org/49928343338.pdfIn PDF document text
    • http://labincom-med.ru/3320020376874fxh.pdfIn PDF document text
    • http://outputqwvk.space/how_to_use_knitting_loom_sethp8cb.pdfIn PDF document text
    • https://doluduzugemuj.weebly.com/uploads/1/3/1/4/131411539/texuzona-ravezenexo-fapolajikawuse.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409110/normal_603d27c9989a9.pdfIn PDF document text
    • http://mosenub.22web.org/que_significa_cizaa_segun_la_biblia.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370530/normal_6025c62a4ef6a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4498997/normal_6002b83b9fc7d.pdfIn PDF document text
    • http://optarfes.com/290522577493kxs3.pdfIn PDF document text
    • http://sberin.xyz/10011594122ijed3.pdfIn PDF document text
    • https://tizupokewa.weebly.com/uploads/1/3/4/0/134013062/4643d82cf1ba.pdfIn PDF document text
    • http://vizit.store/5411079021020vc6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://robuxil.epizy.com/77054729402.pdfIn PDF document text
    • https://s3.amazonaws.com/sirilagewuga/methode_facile_pour_arreter_de_fumer.pdfIn PDF document text
    • https://s3.amazonaws.com/retisovojor/runaway_alice_munro_summary.pdfIn PDF document text
    • https://s3.amazonaws.com/zupenafud/what_does_it_mean_when_it_says_application_under_review.pdfIn PDF document text
    • https://s3.amazonaws.com/rovikibixu/playground_ar_stickers_apkmirror.pdfIn PDF document text
    • http://moxutomib.rf.gd/persona_5_apocalyptic_guide_keeps_healing.pdfIn PDF document text
    • https://s3.amazonaws.com/paropabaru/95119751873.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000118e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118E6 4704 bytes
SHA-256: 1729ec741f6943cb5d704e9661e2795d30378009fe0e4be7a08feb414fa2859a
font_01_sfnt_off000128d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128D5 11656 bytes
SHA-256: 057101a30aab312a33c56e1a4f88b0a217b56d07ffea74394b4a81517157aa5f
font_02_sfnt_off00015057.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15057 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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