Malicious PDF — malware analysis report

Static analysis result for SHA-256 b05fc7d1292d88cf…

MALICIOUS

PDF

82.8 KB Created: 2021-03-01 11:51:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: e99b9436d89b0dd18eaa0d097db99cf2 SHA-1: 84273f71e1dfa55ee2a9af7985a2e9bd2afc587e SHA-256: b05fc7d1292d88cfdd20bada8852a7a708450c466f90d05670adc953a3d280b8
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://dafemum.ru/strik'. This URL is likely used to lure users to a phishing site or download further malicious content. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of a malicious URL is sufficient evidence of a phishing or malware distribution attempt.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://dafemum.ru/strik?utm_term=the+lying+game+season+2+episode+10 In PDF document text
    • http://zugapuvu.mywebcommunity.org/ratio_analysis_class_12.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368999/normal_600a576f2c203.pdfIn PDF document text
    • http://vulufinagi.mypressonline.com/goloduperaxofaledujovoneb.pdfIn PDF document text
    • http://ridunculus.com/the_secrets_to_successful_strategy_execution2jv70.pdfIn PDF document text
    • http://rawoxaxevog.mygamesonline.org/ejemplo_dialogo_directo.pdfIn PDF document text
    • http://koponegigat.medianewsonline.com/xewuteraxiselasati.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484806/normal_5fcbd31ea0fd4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454046/normal_5fda8899684da.pdfIn PDF document text
    • http://parazepurafeza.medianewsonline.com/how_much_is_the_deadpool_suit_worth.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
    • https://s3.amazonaws.com/fajixe/canon_mg3120_scanner.pdfIn PDF document text
    • http://wijuweluxevem.rf.gd/rujarize.pdfIn PDF document text
    • http://mapodivopabo.rf.gd/piderelowolanirimadelener.pdfIn PDF document text
    • https://s3.amazonaws.com/goviwigax/79977305698.pdfIn PDF document text
    • http://xofifozanexez.epizy.com/angry_birds_go_telepods_app.pdfIn PDF document text
    • http://vawibafutij.rf.gd/vavolemasasizama.pdfIn PDF document text
    • https://s3.amazonaws.com/sizadagazagaj/92688315487.pdfIn PDF document text
    • https://s3.amazonaws.com/kitakilesa/bagizaxu.pdfIn PDF document text
    • https://s3.amazonaws.com/devuxuzejozam/assam_bodoland_lottery_result.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_off0000f99e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF99E 5360 bytes
SHA-256: 2a86bfe432093d63937dcb04bbf67aa4e57d3c00e5007d8f2270d560e9a59842
font_01_sfnt_off00010bae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BAE 10684 bytes
SHA-256: bce853c9a632d968354864b4395ebefa392045de170f008337be79131fa4f34a
font_02_sfnt_off00013008.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13008 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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