Malicious PDF — malware analysis report

Static analysis result for SHA-256 615164e94302bf1e…

MALICIOUS

PDF

67.3 KB Created: 2020-11-10 11:50:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 289c7a65ef074f405c59b0b331b561eb SHA-1: f4aa540e13b19c1eb17e96c150bb74155657cb97 SHA-256: 615164e94302bf1e3dc4b9086ef3cc7b6bd4bb899fab9098fe2f46cd6a63d1da
196 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and a machine learning classifier, exhibiting characteristics of a phishing lure. The heuristic 'SE_MFA_LURE' indicates the document is designed to trick users into providing one-time codes or MFA confirmations, a common tactic for credential theft. The presence of external links, including one to 'trafficel.ru', suggests the document directs users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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/123?keyword=ademco+manual+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4445882/normal_5fa1eee865bbb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389792/normal_5f8e3a4c49eb6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366628/normal_5f8773088a7dd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383698/normal_5fa350fedb833.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380068/normal_5f8d92cc8afdc.pdfIn PDF document text
    • https://dimaxafazeza.weebly.com/uploads/1/3/1/4/131453031/xetakoxejikabuz.pdfIn PDF document text
    • https://gagufivelorifig.weebly.com/uploads/1/3/4/5/134596616/xugawoponena_lozatola.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/janodojivi/walmart_beeman_p17_air_pistol_sale.pdfIn PDF document text
    • https://s3.amazonaws.com/mejifavo/bubiruzukawe.pdfIn PDF document text
    • https://s3.amazonaws.com/vabedafozo/49370126804.pdfIn PDF document text
    • https://s3.amazonaws.com/somamere/sandra_lee_recipes_desserts.pdfIn PDF document text
    • https://s3.amazonaws.com/fapaga/physiatrist_salary_michigan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94100c86-c739-4ca4-9624-e11c4268c6c4/tom_goes_to_the_mayor_saxman.pdfIn PDF document text
    • https://s3.amazonaws.com/degagaziv/examples_of_alcohol_support_groups.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_off0000cb20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB20 4892 bytes
SHA-256: 132e083e94983b5ddfb18330f5da4a65c7baec8a98df86c1c4bf1c5417a69408
font_01_sfnt_off0000dbc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBC2 10908 bytes
SHA-256: b36cec6a3e3a4633d2de2a70d14158f3bcc78d04ab6f1fbd4277127fac847ac0

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