Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1b59fdaf005a8c9…

MALICIOUS

PDF

75.1 KB Created: 2021-01-11 07:32:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: a062a16367d5923d507a657715efec7b SHA-1: 9a6e4c6b5ab31b66ec0b9441c8c131d1213c9ff4 SHA-256: d1b59fdaf005a8c995980c19d9d69f4a32f8c8d9e01ad137c1df09c6dfbe0785
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded links, with one specifically identified as a known malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of a link farm suggests an attempt to distribute malicious content or phish users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://gettraff.ru/aws?utm_term=axios+with+formdata In PDF document text
    • https://lipofodimeduwep.weebly.com/uploads/1/3/0/8/130813747/kexodato.pdfIn PDF document text
    • https://vizekufebatovut.weebly.com/uploads/1/3/1/3/131382320/xefizaxesup.pdfIn PDF document text
    • https://cdn.sqhk.co/xisiwuba/jBhhib9/5516173220.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393772/normal_5f9625c3ab44d.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/jebupofedijakuk/genixikixasaxojibigojem.pdfIn PDF document text
    • https://s3.amazonaws.com/lepefi/givudefagazozubajibaluk.pdfIn PDF document text
    • https://s3.amazonaws.com/tesodagiwor/female_merlin_fate_grand_order.pdfIn PDF document text
    • https://s3.amazonaws.com/kasuwevovog/47274284019.pdfIn PDF document text
    • https://s3.amazonaws.com/vinejivunitego/us_constitution_2nd_amendment.pdfIn PDF document text
    • https://s3.amazonaws.com/mewezekilafef/structure_of_the_constitution.pdfIn PDF document text
    • https://s3.amazonaws.com/bupaxomu/adda_247_data_interpretation_book.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA9E 3096 bytes
SHA-256: c92cb3eaf104488ef528131ded4a7927d8c7f031a01ac11967ecf999c6d1c72f
font_01_sfnt_off0000e57f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE57F 5264 bytes
SHA-256: 63607fda36e28fbb2251028a9b8657259afeef1647a38a6cc1bdf17454c4349e
font_02_sfnt_off0000f750.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF750 11724 bytes
SHA-256: 39af94766ae1b14c6b3e64090da1c0e5db02c552cb9e2d95a6b9eff6f0d6b6d8

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