Malicious PDF — malware analysis report

Static analysis result for SHA-256 268460fb33b4328d…

MALICIOUS

PDF

73.8 KB Created: 2021-01-09 12:41:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: b37f8a633eb42083c77de4e6340acc2e SHA-1: 601225d48be0e5d5930b6769fa36d2e0084896f2 SHA-256: 268460fb33b4328d56ebea6674e7b11a17331d2450ef15c06be4259b7a7b570e
154 Risk Score

Malware Insights

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

The PDF contains a link that redirects to known malicious infrastructure, disguised as a 'free barista training manual'. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the embedded URL is the primary indicator of compromise.

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://traffine.ru/123?utm_term=free+barista+training+manual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4383565/normal_5f8dc5eb113b3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367275/normal_5f87494eed74b.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/febopa/bibufikafoguzasabexojog.pdfIn PDF document text
    • https://s3.amazonaws.com/toguvaju/dont_worry_song_mr_jatt.pdfIn PDF document text
    • https://s3.amazonaws.com/nolarifaforuxop/asking_for_and_giving_information_dialogue.pdfIn PDF document text
    • https://s3.amazonaws.com/juzinaramip/remicade_infusion_protocol.pdfIn PDF document text
    • https://s3.amazonaws.com/magapeguwabe/ultramind_solution_companion_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/buxoparadazegu/22298736553.pdfIn PDF document text
    • https://s3.amazonaws.com/vavale/58490402352.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1798c0f0-6e97-4102-b658-79de3376e8f4/71333860067.pdfIn PDF document text
    • https://s3.amazonaws.com/betefowubevat/pikovusuk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a5ec591-6f42-411a-b4fc-25dc8d08ec2e/nakaboke.pdfIn PDF document text
    • https://s3.amazonaws.com/jejulurowev/nojabagijedefesiga.pdfIn PDF document text
    • https://s3.amazonaws.com/davubewu/morphology_of_flowering_plants_class_11.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_off0000e3bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3BC 5100 bytes
SHA-256: a1d5c773ffd24270572f12ed33b11c10d3a51763d0358cc78578b197b343fa35
font_01_sfnt_off0000f500.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF500 10916 bytes
SHA-256: 9b531338f7d79111b7599941e15cdca5d6ff696f3a7c7d051725a43969e245ee

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