Malicious PDF — malware analysis report

Static analysis result for SHA-256 429df5b3e1fb127c…

MALICIOUS

PDF

67.1 KB Created: 2020-12-23 18:40:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 26574c82558769394fcf21338c63cc12 SHA-1: 1c6501faad9b8c1ed8e9cbcb7017f28943c5368e SHA-256: 429df5b3e1fb127cb86fca3d01a2c8dd787b7b3b2488ff373adb2ae2e231760f
164 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing lure. It contains a large number of external links, suggesting a link farm designed to redirect users to malicious sites. The presence of embedded URLs and the 'SE_INVOICE_LURE' heuristic indicate a social engineering attempt to trick the user into clicking on a link, likely leading to a second-stage payload or phishing page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://traffine.ru/strik?utm_term=swepco+bill+pay+online PDF link annotation
    • https://finolija.weebly.com/uploads/1/3/4/6/134625313/zofibiwofolejitu.pdfIn PDF document text
    • https://cdn.sqhk.co/sukurorezib/OjbC9jd/momirasix.pdfIn PDF document text
    • https://cdn.sqhk.co/wememiguw/KcCDsjg/zigzagoon_evolution_chart_sword_and_shield.pdfIn PDF document text
    • https://lakowabanitewot.weebly.com/uploads/1/3/4/8/134898259/rogosupata-jozafiwogis.pdfIn PDF document text
    • https://cdn.sqhk.co/lizupasepafu/ajfhd7J/pimobazetixodamat.pdfIn PDF document text
    • https://cdn.sqhk.co/lasotepana/C4mr7hd/real_racing_3_wiki_cars.pdfIn PDF document text
    • https://fipamowusaki.weebly.com/uploads/1/3/4/8/134879766/rikubegad.pdfIn PDF document text
    • https://cdn.sqhk.co/bifugudawesu/BwibnfG/photosynthesis_lab_report_introduction.pdfIn PDF document text
    • https://cdn.sqhk.co/goremujoz/BCPP1gh/73176115374.pdfIn PDF document text
    • https://cdn.sqhk.co/dijobika/gd2hgg0/4404082344.pdfIn PDF document text
    • https://cdn.sqhk.co/fipexuwebo/MdsmAhc/love_poly_new_puzzle_game_apk.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/0640f966-5af7-4cd9-9082-7237a61566e3/superior_point_method_marketing.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94d71880-7530-48cf-8e63-c6001295e969/70621017723.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/231f7500-259e-4aa6-b7f9-6c5eb4936e0d/pitusitananurimime.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_off0000c9d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9D3 5088 bytes
SHA-256: 9f334ecda50cba52de6a1955e852a4fa7775ddfc4761c79a72e52cb4456a01b5
font_01_sfnt_off0000db52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB52 10816 bytes
SHA-256: 7bb5aa0552aa912387d59dca9e813e49c87d1d3e46b4439eebe6591f3d0a8546

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