Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4afba1effaf4042…

MALICIOUS

PDF

72.6 KB Created: 2020-11-18 22:00:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 876cbaabc79f78a700cc83bff51e1746 SHA-1: df3031c7a64a07605974a5285c709e91a63c1e24 SHA-256: c4afba1effaf40429fba6be67b910ca75c2fe00641b62c8c359c7523bf6cd8f8
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/strik?utm_term=drumline+cadences+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4383565/normal_5f977a5077ecb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367951/normal_5f98d26ff24ea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366306/normal_5fa9cd7d39131.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380854/normal_5f9ae139dff3a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370078/normal_5f89cb6f76bbd.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/b20c380d-966b-405c-bb05-ec1b7f984a9e/ruger_police_service_six_9mm.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97f5ead0-4272-49ed-8c04-740705e2784f/casa_ejidal_tateposco_tlaquepaque.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c24e3c8b-d201-497b-a034-561ed0115c9f/ripekaludidudegemalujunof.pdfIn PDF document text
    • https://s3.amazonaws.com/bewibiwat/unblocked_bubble_shooter.pdfIn PDF document text
    • https://s3.amazonaws.com/dujepav/ratenewomesukotisurapim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bfef7fa9-ccb0-4118-b570-c6c3c63d1042/94940151158.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a4c80c6-d6c3-4752-8745-be6037027d8f/kupudewefas.pdfIn PDF document text
    • https://s3.amazonaws.com/fosalizuzu/winnie_the_pooh_personality_test.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27e3621f-de7f-42f8-adba-cd4df826557c/loxeb.pdfIn PDF document text
    • https://s3.amazonaws.com/jivuxo/naina_lagiya_barisha_song_320kbps.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_off0000d15b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD15B 5300 bytes
SHA-256: 6837f0a567382e6eaffb8974905a224aa275d42c9823cddecdce8669fd262d23
font_01_sfnt_off0000e345.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE345 3120 bytes
SHA-256: c9b5c4904a063eda2fd006e21c0d11b7d9e09ba17605c18bcc17455d537c1e8f
font_02_sfnt_off0000efcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFCB 11052 bytes
SHA-256: f933f55a28446c744ab2c3ce941b212069c945bd0e9785bf49e6a657d0af9f1c

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