Malicious PDF — malware analysis report

Static analysis result for SHA-256 586f3627781994bd…

MALICIOUS

PDF

66.6 KB Created: 2020-12-16 10:47:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 830092407976802e1dbe6cfac0ad93fa SHA-1: 16dabfff381f746ba896685f387fa158cc47f457 SHA-256: 586f3627781994bd1cc578c4a79e0eba141f958cda5ce07b7142e7e61c986a8b
156 Risk Score

Malware Insights

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

The PDF file contains heuristics indicating it is a phishing document and has been flagged by ClamAV as Pdf.Phishing.Trojan. The embedded URL 'https://trafffi.ru/strik?utm_term=v+player+apk' suggests a lure to download an application, likely malicious. The PDF also contains a link farm, further supporting its malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafffi.ru/strik?utm_term=v+player+apk PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4377401/normal_5f8df511a847d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375339/normal_5f894331333ed.pdfIn PDF document text
    • https://tewodoxes.weebly.com/uploads/1/3/4/3/134368692/miwomuku-dafawurariveput-bobife.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369916/normal_5f8f37dbb1cbc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367905/normal_5f922663d7640.pdfIn PDF document text
    • https://matazesugol.weebly.com/uploads/1/3/4/7/134702103/gotim-gonujukipizi-jikotesolib.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/5fbce344be7cfc36344e8aaf/t/5fbd0a5f1491241adc4775f9/1606224490112/weder.pdfIn PDF document text
    • https://s3.amazonaws.com/nafoxuda/pixel_survival_2_apk_mod.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0672f60f2895dc1e54ab2/t/5fcc3a6624c49707d3123865/1607219815205/worupebizoloxuzugixe.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbfff689955c744b536924c/t/5fc97710dffee55515141268/1607038737127/ruvujat.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc10996a879396864091186/t/5fd063bf3364176a125b69ec/1607492546041/lezenodesirojuziza.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0ed17f7cf8c75402b0ccf/t/5fc35fa73485235c8632134c/1606639527618/anime_couples_pfp.pdfIn PDF document text
    • https://s3.amazonaws.com/diwitapezu/pirouette_cacahute_paroles.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf4cd908845d092480abdc/1606372569953/white_pages_wa.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_off0000c5ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5AB 4768 bytes
SHA-256: 171889b8b589bce2cbe1c0f59300a32621ae7732910124b533b861a1fc3f5c73
font_01_sfnt_off0000d5fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5FD 11604 bytes
SHA-256: 160f250ac22e84369afe19264f9126f0cf37bb3becdae5fe882f3f5b88ab8b53

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