Malicious PDF — malware analysis report

Static analysis result for SHA-256 190de2b0223572d9…

MALICIOUS

PDF

70.0 KB Created: 2020-12-18 23:35:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: dd36900e310f2098129c660e120e262d SHA-1: 15dd550b329c15704511727cf42d0868fc06351e SHA-256: 190de2b0223572d9a09e585fe7ae8cd7ec2a8ce8d312033939ef6d2c9dbc9252
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to external resources, indicative of a link farm or phishing attempt. One critical heuristic firing identified a link to known malicious redirector infrastructure at 'traffmen.ru'. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffmen.ru/123?utm_term=level+54+guess+the+emoji In PDF document text
    • https://cdn-cms.f-static.net/uploads/4384310/normal_5fa394a447ba2.pdfIn PDF document text
    • https://tudupumodowi.weebly.com/uploads/1/3/1/4/131406798/7173189.pdfIn PDF document text
    • https://ramakizuwag.weebly.com/uploads/1/3/4/3/134321509/wopoged-kanite.pdfIn PDF document text
    • https://serawododi.weebly.com/uploads/1/3/4/8/134885696/1676e7030.pdfIn PDF document text
    • https://julupovopanar.weebly.com/uploads/1/3/4/7/134732987/2350761.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408336/normal_5fd957a7e55d4.pdfIn PDF document text
    • https://fenejetamop.weebly.com/uploads/1/3/4/6/134697978/jagiz.pdfIn PDF document text
    • https://dolevepi.weebly.com/uploads/1/3/4/5/134587457/kufujixodi.pdfIn PDF document text
    • https://tadomowiwelam.weebly.com/uploads/1/3/4/7/134744739/kerasano.pdfIn PDF document text
    • https://wasafigazepez.weebly.com/uploads/1/3/4/5/134586721/6372707.pdfIn PDF document text
    • https://nolemidu.weebly.com/uploads/1/3/4/5/134584078/379078.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/kotenu/5564349968.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxutedi/ritugatezasekaxurokomok.pdfIn PDF document text
    • https://s3.amazonaws.com/lizuseguwix/incomplete_dominance_sample_problems_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/91435579692.pdfIn PDF document text
    • https://s3.amazonaws.com/vonusirukete/formal_letter_sample_canada.pdfIn PDF document text
    • https://s3.amazonaws.com/fexuror/blackmart_pro_apk_for_android.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_off0000d4db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4DB 5080 bytes
SHA-256: d123b99e0c05b3f91f8ddb7c1282207e8533863a48cf9d3ef9c7161697a4d770
font_01_sfnt_off0000e61f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE61F 10380 bytes
SHA-256: 9f9ea32b78952689bd7ff0715e41c19aa20702e8e987e0ceeb056f7034e2000b

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