Malicious PDF — malware analysis report

Static analysis result for SHA-256 c44b6978eab28793…

MALICIOUS

PDF

66.4 KB Created: 2020-12-19 01:55:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 6feba8e47987ebf86b6c52aacca9d53f SHA-1: 9c5f77700565eceba11d3e21c3f51c0229e5afd2 SHA-256: c44b6978eab28793bfa054c7b251623d320eb9a3be723ee5106889bf2b736188
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a known malicious redirector. The document's content, though obfuscated, suggests a lure related to 'Flashback x4 manual'. The presence of multiple external links points towards a link farm or phishing campaign designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffking.ru/strik?utm_term=flashback+x4+manual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4493569/normal_5fd840544c63a.pdfIn PDF document text
    • https://zoludapi.weebly.com/uploads/1/3/4/5/134528767/7836791.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401972/normal_5f9fab624b34b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393637/normal_5fc1c6b832ec7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381546/normal_5f9d933a949f1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501364/normal_5fae02881cb57.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc30874df132613bbcb9d36/t/5fc54534bc819f1cf485a913/1606763829211/install_showbox_apk_tablet.pdfIn PDF document text
    • https://s3.amazonaws.com/podawakumepewez/variedades_de_mandioca.pdfIn PDF document text
    • https://s3.amazonaws.com/vibuvomomuv/30403846370.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fcf3d5fa1725102607b4313/t/5fd0886851357b44bb934b95/1607501930896/20533798711.pdfIn PDF document text
    • https://s3.amazonaws.com/wizedumi/gusikolamotemane.pdfIn PDF document text
    • https://s3.amazonaws.com/xufaxoferugod/gobstones_with_chiara.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_off0000c666.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC666 5260 bytes
SHA-256: d7efe4e90b6bc30dc92b4b013e72d46e52114bf3b2a3933632b7b35a89e20d7e
font_01_sfnt_off0000d830.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD830 11072 bytes
SHA-256: ba694f6794e35fad45811778169bc4368b957918b13becc3f5e1ccd5f69ed414

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