Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6b4da50846856bc…

MALICIOUS

PDF

65.2 KB Created: 2020-12-24 13:18:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 07163769216a5eda7d06b1ae062d7260 SHA-1: 9d1730472eb67a20b4eb798be6f5826009746881 SHA-256: a6b4da50846856bcf945f9b9dd4e6bd061535112cd2ae0729b8d4ff79813fb42
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL that directs users to a suspicious domain, likely as part of a phishing or malware distribution scheme. No scripts were extracted, but the presence of an external URI and the overall detection profile suggest an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

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
  • 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/aws?utm_term=dance+hip+hop+photo PDF link annotation
    • https://cdn.sqhk.co/sofaxuleruri/gfjh3d2/7663325997.pdfIn PDF document text
    • https://mebijakonenu.weebly.com/uploads/1/3/4/4/134458360/tivifuleko.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417525/normal_5fc8680387c64.pdfIn PDF document text
    • https://pamukisap.weebly.com/uploads/1/3/4/7/134761215/7c933a794815.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/54ad3e46-d9f4-45f0-8525-8bb9ef393588/pastorelas_comicas_cortas_guion_grat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5da36f4f-ff63-4ba2-9080-aa3a89c8ea27/wiweledoritasibetajawuz.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/fusionner_2_avec_adobe_reader_xi.pdfIn PDF document text
    • https://s3.amazonaws.com/rimepusox/radone.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73f48f26-bf16-4488-b702-f0fecf409332/21094161830.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_off0000c51a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC51A 4716 bytes
SHA-256: bb49151e54740bd67489b341fd4570d8e94075890f682cf732f83efaeacd6529
font_01_sfnt_off0000d529.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD529 10456 bytes
SHA-256: c102ced15b67f349f176add4f00afcd1ee9663fd8768e2df908be172d4c4af47

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