Malicious PDF — malware analysis report

Static analysis result for SHA-256 c01b543213ddd8ff…

MALICIOUS

PDF

97.2 KB Created: 2021-01-08 18:23:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 5bcc137c3e17b546961086f0eda6058f SHA-1: 8036776cbd3242afe49035f978a28833c5d6843c SHA-256: c01b543213ddd8ff05cfe16fad01cfa1a3b7f5bec3bad3767f9443d8e58cccb9
274 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document contains multiple embedded links, including one to a known malicious redirector. The heuristic 'SE_BRAND_CREDENTIAL_PHISH' indicates a credential phishing lure impersonating Microsoft, directing users to a malicious URL. The presence of numerous external links suggests an attempt to distribute malicious content or engage in SEO manipulation for phishing purposes. No scripts were extracted, but the document's structure and embedded links strongly indicate a phishing attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://xoraxabaxid.weebly.com/uploads/1/3/2/6/132682630/mowasafiv-xezuvazirawidu.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=windows+10+update+2018 In PDF document text
    • https://xoraxabaxid.weebly.com/uploads/1/3/2/6/132682630/mowasafiv-xezuvazirawidu.pdfIn PDF document text
    • https://wipomozexabezi.weebly.com/uploads/1/3/0/7/130776841/kupoxenegavo_rowefipimesoge.pdfIn PDF document text
    • https://gatilavim.weebly.com/uploads/1/3/4/3/134391542/434f53.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408593/normal_5f9350b7a99bc.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/xupovobejanam/63651596933.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94251e1a-fa7a-4c57-92dd-425abc3500b4/68997394901.pdfIn PDF document text
    • https://s3.amazonaws.com/panalipolifod/51038062129.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3867880-cc89-4555-bbd0-be73ff6ed552/39070766211.pdfIn PDF document text
    • https://s3.amazonaws.com/viwoxuz/lelujavaderazebupum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28e94532-5a91-40a8-b3b8-09a72a4ba59d/simekivizasewisa.pdfIn PDF document text
    • https://s3.amazonaws.com/jevelel/wrong_turn_4_full_hd.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/263d9659-0aa9-44b5-9bd8-1a113de2c368/fusanejopadebobixunoga.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_off00013f37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F37 5448 bytes
SHA-256: 9e608bec6c5699f2f530fade44223f0b73fee5ad53c20da85b9489bfe27272c1
font_01_sfnt_off000151ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x151EF 11400 bytes
SHA-256: d03e3ea520f03816075ec68b4485eab2ec2bd6eefeea4b664275593a2b045922

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