Malicious PDF — malware analysis report

Static analysis result for SHA-256 11edbea3e2099357…

MALICIOUS

PDF

71.2 KB Created: 2020-12-30 08:49:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: bc079dbd9472c7d3cedfcb4498cee0eb SHA-1: d5a6d835e78aafdee9108b313275ffbdaf60c28a SHA-256: 11edbea3e2099357e2b2e7ca5d5a150e1029d20deba5aa62863b20c90961281d
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with at least one identified as a malicious redirector. The ClamAV detection and ML classifier strongly 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 exploit users by directing them to malicious content.

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
  • 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://traffine.ru/123?utm_term=bellator+star+destroyer+model In PDF document text
    • https://cdn.sqhk.co/bowewulaxam/aNhiC0e/difuwor.pdfIn PDF document text
    • https://nufodovepitad.weebly.com/uploads/1/3/4/7/134718778/5746839.pdfIn PDF document text
    • https://cdn.sqhk.co/fisejadiruw/1jhthin/rogilaxiwolitowaxogode.pdfIn PDF document text
    • https://kinojapi.weebly.com/uploads/1/3/2/3/132302846/4759772.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/22321547214.pdfIn PDF document text
    • https://s3.amazonaws.com/jimugivos/fifodafowurifipawixunumod.pdfIn PDF document text
    • https://s3.amazonaws.com/sigobija/44827595860.pdfIn PDF document text
    • https://s3.amazonaws.com/simujix/breville_bread_maker_bbm800xl_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/nodetuxapabara/83707364379.pdfIn PDF document text
    • https://s3.amazonaws.com/zufojadibi/zonagivemuzasej.pdfIn PDF document text
    • https://s3.amazonaws.com/litunux/12478707219.pdfIn PDF document text
    • https://s3.amazonaws.com/tomamujuf/relative_clauses_advanced_exercises_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/saziwijaxodav/wusodawoloxeb.pdfIn PDF document text
    • https://s3.amazonaws.com/saxefi/ladudu.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_off0000db00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB00 5120 bytes
SHA-256: de7406df1597f88a88d17f2acc3f9206361a442c11536452e65ee9bc77210e48
font_01_sfnt_off0000ec5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC5B 10300 bytes
SHA-256: cabc73d7da59cd826d9250a72c5787d287d4cfc13785cafbcbd7c9536e75f28a

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