Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e167ee84734bd02…

MALICIOUS

PDF

102.1 KB Created: 2020-12-16 01:59:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: cbe289fb7a348c9f0c00e392152f4d2c SHA-1: 3590588523af8c326ae123d625c69bedb1377700 SHA-256: 0e167ee84734bd02c37ffb3f8e2f48744318a5001023d5172f9fd1f2fe28463f
156 Risk Score

Malware Insights

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

The PDF contains a heuristic firing indicating a link farm with numerous external PDF links, suggesting a phishing or malware distribution campaign. One of the external links, 'https://traffnew.ru/wb?keyword=eft%20gunsmith%20part%204%20guide', is presented as a lure. ClamAV detection and ML classification strongly indicate maliciousness, specifically as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffnew.ru/wb?keyword=eft%20gunsmith%20part%204%20guide PDF link annotation
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/wiworo-roligotabikasug-pirikubiriga.pdfIn PDF document text
    • https://dibozavo.weebly.com/uploads/1/3/4/5/134501923/5bc8ca229b1be9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/dudurat/momavomorigafejuvon.pdfIn PDF document text
    • https://s3.amazonaws.com/samopakamefap/tozam.pdfIn PDF document text
    • https://s3.amazonaws.com/winumigutam/8891854038.pdfIn PDF document text
    • https://s3.amazonaws.com/muvarelo/11912098954.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d49d4ff-f3ac-4b18-ad3f-41a83bfd84e5/kurij.pdfIn PDF document text
    • https://s3.amazonaws.com/bivanud/nugifegazitadirasolosewi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7060737e-c678-4296-898f-8db222336fbd/jesojimisatubedifafo.pdfIn PDF document text
    • https://s3.amazonaws.com/rupatojuko/rewesobotelufawusivekun.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/30597953369.pdfIn PDF document text
    • https://s3.amazonaws.com/sedimeraxufi/zagowixeti.pdfIn PDF document text
    • https://s3.amazonaws.com/mogipegi/formal_accusation_legal_definition.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_off000150d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x150D3 5468 bytes
SHA-256: 47633a092942fbfbd575694d75ac863335090234e45065b3f87a2e42b53b3e6c
font_01_sfnt_off00016352.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16352 11812 bytes
SHA-256: 17caacab8db54069c073f19c4414e2e4ea1f89c1a09db1d69de0487d46942b26

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