Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0ae85b0876b6967…

MALICIOUS

PDF

74.9 KB Created: 2021-01-03 13:04:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 9b58de73e4f68452d771b6b41576d82a SHA-1: eefba9cb29ea2e82a830ce3ddbaddc3eeb843a42 SHA-256: e0ae85b0876b6967d75f47a85333a5d07850365cf96015b81c1e8e1b2e962abd
274 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file is identified as a credential phishing lure, specifically impersonating PayPal. It contains numerous links to external PDF files, many of which lead to redirector infrastructure, including the critical URL https://traffmen.ru/aws. The file also leverages embedded links to host further malicious content, such as the link to https://kefelewupu.weebly.com/uploads/1/3/4/7/134711224/1808109.pdf, which is part of the phishing infrastructure. The presence of these redirectors and the direct phishing lure indicates a multi-stage attack designed to harvest user credentials.

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
  • 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.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://kefelewupu.weebly.com/uploads/1/3/4/7/134711224/1808109.pdf.
  • 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/aws?utm_term=add+subtract+multiply+divide+decimals+pdf In PDF document text
    • https://static.s123-cdn-static.com/uploads/4412170/normal_5fe1b1a46e2bd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488100/normal_5fca92bc9309f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392191/normal_5fc353226ccbf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392873/normal_5fe171a08d57b.pdfIn PDF document text
    • https://cdn.sqhk.co/jivomawufem/VeWyhg1/swing_states_2020_fox_news_map.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393183/normal_5fe61c6aaa367.pdfIn PDF document text
    • https://kefelewupu.weebly.com/uploads/1/3/4/7/134711224/1808109.pdfIn PDF document text
    • https://buranujepexu.weebly.com/uploads/1/3/4/3/134339299/8ad1951.pdfIn PDF document text
    • https://vosutiwurog.weebly.com/uploads/1/3/5/4/135400890/vezer.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405459/normal_5fe0dea402308.pdfIn PDF document text
    • https://wepebagelokej.weebly.com/uploads/1/3/4/5/134583559/526d8fa33ab8a6f.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/8f3b1165-bce6-44e4-8bb1-b3a27382744b/cissp_guide_to_security_essentials.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d1e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1E6 5592 bytes
SHA-256: b6799f0d1e2cff581e05bd3250d62430f1f2e71aa7da24691e2f5b6975f3e600
font_01_sfnt_off0000e4e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4E0 10608 bytes
SHA-256: 4ce009a44877c42a52f279a6a950edb2f2dfad26879b2a432871ba047521d1e1
font_02_sfnt_off0001096f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1096F 16092 bytes
SHA-256: c9557d91917e40dbb2ce09b7ef560a04a9a832ffe2ebcac6b50408a58351272e

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