Malicious PDF — malware analysis report

Static analysis result for SHA-256 cae78d0b0b7d561d…

MALICIOUS

PDF

67.5 KB Created: 2020-12-27 09:18:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 5c8b5fe264352c690907198a2125511f SHA-1: 326d02f3e729364bbab7243436355c751665c267 SHA-256: cae78d0b0b7d561d2fe0cba5311e8398c2ce65e546fd1fd59fde7eefcdfd6949
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, suggesting a link farm or redirection mechanism. The document body, though partially corrupted, suggests a lure related to "Deja vu imdb parents guide", which is likely a pretext to drive users to malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://trafftec.ru/aws?utm_term=deja+vu+imdb+parents+guide PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4403418/normal_5f98562739f64.pdfIn PDF document text
    • https://cdn.sqhk.co/fabupiguboxa/he9m6he/52426923810.pdfIn PDF document text
    • https://cdn.sqhk.co/kinirebuseva/haSziab/texibijotosuwi.pdfIn PDF document text
    • https://toraboretopupu.weebly.com/uploads/1/3/4/7/134769369/mebusemojok-tularivad-merikowadu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497353/normal_5fd947553d194.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367286/normal_5f91295789a2c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425919/normal_5fcf171ce647a.pdfIn PDF document text
    • https://cdn.sqhk.co/riwajamugem/iiiight/pizzaiolo_menu_isle_of_man.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366341/normal_5f87350a9ce95.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/fuwenoxuzasila/mitozoseretodutulobulofu.pdfIn PDF document text
    • https://s3.amazonaws.com/tumasun/spandana._ap._gov._in_application_form.pdfIn PDF document text
    • https://s3.amazonaws.com/jepinebawo/ignou_bcom_syllabus_2016.pdfIn PDF document text
    • https://s3.amazonaws.com/bulozor/cellular_biology_crossword_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d557be8-38af-478a-91f2-1c9530635b48/39369107888.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_off0000c7f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7F6 5524 bytes
SHA-256: 080e14565f894d95945c50ba08602d88bf7056618800e443014f8ccfba0c1ff1
font_01_sfnt_off0000dab3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAB3 11584 bytes
SHA-256: ff2a93945b81b2264968cad8a177e83728411494b4bce412fd2c261ff4fad82f

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