Malicious PDF — malware analysis report

Static analysis result for SHA-256 552ffa2a007cd5cc…

MALICIOUS

PDF

77.8 KB Created: 2021-01-03 22:59:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 41fc62e36216ab071bab03c79f4b91d8 SHA-1: 1c527ea25ad1f181f48eea800aea9d6f9c077880 SHA-256: 552ffa2a007cd5cc69d77538bfb39b3d33a46372375547073ee19c8685774b44
96 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The embedded URL points to a domain that appears to be part of a phishing or scam campaign, disguised with a search query. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to redirect users to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/wb?keyword=capstar%20for%20puppies PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4401985/normal_5f97a6bfe0a21.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460072/normal_5fb9ffd0558d0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455179/normal_5fcce5f3e9289.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488580/normal_5fb49dd75601d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392871/normal_5fec78628ff3b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490371/normal_5fd99d678823b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405179/normal_5fc6af9540f42.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/bb89c434-563c-4c20-9afe-9e1d37c1b373/57421970436.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3bba982a-3e06-4fb7-8d37-a7035ace868d/96836004016.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/097921a1-e6b1-4a3e-86df-03bbac2a0694/xoneponipojuwigeb.pdfIn PDF document text
    • https://s3.amazonaws.com/kewuxejikiwe/pesozoxi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4005061a-63f2-43df-aa22-b3d50e3b0953/tabitikepenakafexusogabur.pdfIn PDF document text
    • https://s3.amazonaws.com/redegelesibif/72743953479.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7829100-9e12-43a4-acfd-1e3737d7018f/the_kissing_booth.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e6c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6C7 4660 bytes
SHA-256: bff054ee33b23dc204038104b1f0f257643e541208f27e0c1086ebc090ccd199
font_01_sfnt_off0000f6b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6B9 11112 bytes
SHA-256: 5877db42bc3514ad784e2b485c4b91f9bde3ef77c972bfb7b87fc54bf4eb454b
font_02_sfnt_off00011c6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C6E 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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