Malicious PDF — malware analysis report

Static analysis result for SHA-256 be5a1452bb2f43c2…

MALICIOUS

PDF

92.8 KB Created: 2020-12-21 12:11:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 8303a47b649e8f46d8053fde448b1ed9 SHA-1: d5010b6cc98f8b46ecc7b4a954181a5c226c53e0 SHA-256: be5a1452bb2f43c24982417c80a44479d694341f92dd329e8fe363c34cb11895
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a common tactic for SEO spam or phishing campaigns. The 'ML_NYX_PDF_MALICIOUS' and 'CLAMAV_DETECTION' heuristics strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to potentially harmful sites, possibly as part of a larger phishing or malicious content distribution scheme.

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
  • 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://trafficel.ru/strik?utm_term=preppers+food+checklist PDF link annotation
    • https://pibazafefudo.weebly.com/uploads/1/3/0/7/130776509/jukesozulux.pdfIn PDF document text
    • https://varipejat.weebly.com/uploads/1/3/0/7/130739080/rilopenatoxelogapil.pdfIn PDF document text
    • https://xefafarorul.weebly.com/uploads/1/3/4/6/134698093/ruforo-jilizuma-papoxo-wufenireratax.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389352/normal_5fc3ce00cb287.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495055/normal_5fcd8b66d3b84.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372076/normal_5fbd47605aa81.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427519/normal_5f986ce35d518.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba6c3855-5527-4c3a-a557-d20c6da9dc4b/gold_rush_elementary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2538026b-3422-4826-bf54-d560d4c516b4/devewebeno.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0de9c5bcb0228a2825217/t/5fca2cc71a258d244fe7a852/1607085257279/grow_idle_archer_firing_order.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d4efec8-2f91-4d16-bb40-3891322e67da/berijulawujogax.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdc9ff03a83d042422c3343/t/5fdcb7decb26ee73a99c888d/1608300511846/tigofulu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9861657b-bdea-4043-9755-20756842903d/1946_chevy_pickup_truck_value.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_off00012d88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D88 5096 bytes
SHA-256: efbae3835da23119e107ec0f5e362a57da28d97f06b357b13ae40ae33260c9dc
font_01_sfnt_off00013ede.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13EDE 11548 bytes
SHA-256: c833409c41db6cc0bde9b1cabc7d627cbdd7e57d4c8ad31d8a788bbe986c0f11

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