Malicious PDF — malware analysis report

Static analysis result for SHA-256 56b431dff6199921…

MALICIOUS

PDF

67.2 KB Created: 2020-12-16 21:01:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: f1398d7c9ae87718514098134b645c10 SHA-1: 1c2fcdb61bfd61d159b9c66c0f141ac247b0eb99 SHA-256: 56b431dff61999218ce9d8a80e53d4f914a2aef9ff8ec2c22c4cd887a0c2fcbb
214 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one identified as a known malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, contains references to 'apkpure' and 'dead trigger 2', suggesting a lure for potentially malicious applications or games.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • 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.
  • 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://gettraff.ru/123?utm_term=apkpure+dead+trigger+2 In PDF document text
    • https://lozulijulejibog.weebly.com/uploads/1/3/1/8/131857057/vilofi.pdfIn PDF document text
    • https://wanizirutakel.weebly.com/uploads/1/3/4/6/134678241/zixojixofego-tugugixanepib-lodoximid.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366366/normal_5f8953a86cacc.pdfIn PDF document text
    • https://guvepilafofifiv.weebly.com/uploads/1/3/4/6/134682232/25cadaa.pdfIn PDF document text
    • https://nolujamikudaze.weebly.com/uploads/1/3/4/8/134868466/zevagiwe-bunibiziko-kanekimog.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc0e844cd1e280355d45049/t/5fc2f12264571256549d9f57/1606611235168/54401236649.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0ca7740f1034a5ca83b63/t/5fc6ddcce2dcb1274dde0b42/1606868430940/fruits_milk_shake_maker_for_sale.pdfIn PDF document text
    • https://s3.amazonaws.com/mexavofezoxi/saturation_knob_dll.pdfIn PDF document text
    • https://s3.amazonaws.com/jinabom/mewewozarupizamug.pdfIn PDF document text
    • https://s3.amazonaws.com/tumasun/game_for_peace_beta_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/xezujuxoz/sizolizujidajajimugimux.pdfIn PDF document text
    • https://s3.amazonaws.com/sewamos/98868027971.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf5c37e18c5c478ef36332/1606376504444/21246055304.pdfIn PDF document text
    • https://s3.amazonaws.com/zifozujiwi/brosur_kabel_eterna.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc7b3e8d8e4f4479968ac2c/t/5fcd7b6df94b6402b230b594/1607301997946/download_game_sas_zombie_assault_4_mod_apk.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_off0000c9bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9BB 5100 bytes
SHA-256: 968f13aee9ed7a4119f70598292feb420880b02ea7b55b340d473ef3560b64dc
font_01_sfnt_off0000db28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB28 10828 bytes
SHA-256: 10385027d01b642375e90e3c601be0a86a4461ad07fefd210636c61fa56cfb85

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