Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cb1588e46a06a86…

MALICIOUS

PDF

76.7 KB Created: 2020-11-23 22:43:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 979344b6c86421f0566847e5ef6cc5ba SHA-1: 170581cc5b7daabf3005f8b31f1c57e284b84267 SHA-256: 0cb1588e46a06a862fdafdc4e5055bb667fa9c13d549b2b9a2e352529712bfda
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with at least one identified as a redirector to known malicious infrastructure. The ClamAV detection and ML classifier further indicate malicious intent, likely for phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect the user to a malicious site.

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://cctraff.ru/strik?utm_term=tecnicas+de+ventas+efectivas+por+telefono In PDF document text
    • https://cdn-cms.f-static.net/uploads/4367911/normal_5fb57163bcae4.pdfIn PDF document text
    • https://fewidatemuvej.weebly.com/uploads/1/3/4/2/134266352/mitilirasu_jutukij_jujojifuzid.pdfIn PDF document text
    • https://biwomewiwuxe.weebly.com/uploads/1/3/4/1/134131409/wubujepasi_lidosesamabaro_pewuwuwomer_sumujamekik.pdfIn PDF document text
    • https://mamexobupelo.weebly.com/uploads/1/3/1/3/131383482/ribovidugawakuj.pdfIn PDF document text
    • https://depumubawaminuk.weebly.com/uploads/1/3/4/2/134236244/1598966.pdfIn PDF document text
    • https://ruzudafuzozuxu.weebly.com/uploads/1/3/4/8/134847081/170838c.pdfIn PDF document text
    • https://mimatetozolo.weebly.com/uploads/1/3/4/7/134707120/xupiruvebugusa-wobepobewoj.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/webipejonavuv/average_daily_balance_definition.pdfIn PDF document text
    • https://s3.amazonaws.com/xedewofuretujo/sony_optical_block.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7fc9ab9-8692-4407-92c9-69ba28b32496/all_i_want_for_christmas_is_you_pian.pdfIn PDF document text
    • https://s3.amazonaws.com/fotojipifuzitul/afroman_because_i_got_high_music.pdfIn PDF document text
    • https://s3.amazonaws.com/roxawo/25273730574.pdfIn PDF document text
    • https://s3.amazonaws.com/bevarolimesale/37688135116.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a08daecf-f1a9-4be5-83f3-7912d03f1820/69664915538.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_off0000eaf9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAF9 5156 bytes
SHA-256: 562fcc7171791c71f34fc837623cc6f19b3cce43fc7f77ff5ac48d0d47fa58a1
font_01_sfnt_off0000fc9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC9A 12080 bytes
SHA-256: 120fad21dc67dd88e2465a71d4e96e46cc62a6d4dc037ff26a76d9d0d73ab24e

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