Malicious PDF — malware analysis report

Static analysis result for SHA-256 53a578830c19e3c8…

MALICIOUS

PDF

69.3 KB Created: 2020-11-23 22:48:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 020b5ff60aba363265073844f7c2e5a6 SHA-1: 5ae118567f6eac3c004f393279876b4fc5757ecc SHA-256: 53a578830c19e3c8f0b82a795ce7b2c72151f5b12f5585a2302ac6bfd8b780fc
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://trafffe.ru/strik?utm_term=pathfinder+ultimate+psionics+pdf+download+free PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369522/normal_5f9f1e5154c04.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365998/normal_5f8773532bc7e.pdfIn PDF document text
    • https://neboxikadifi.weebly.com/uploads/1/3/4/5/134588308/sidezesuxomotupasok.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/lolijexejomak/adjective_phrases_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/liguwubore/roblox_piano_script_hack.pdfIn PDF document text
    • https://s3.amazonaws.com/wogikokuzotaxa/carlos_castaneda_relatos_de_poder.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a94642e3-1148-4a87-8b09-a1868db39af9/xojivovubozoliduduredegi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45550469-e142-4702-a6a6-1fb20e7ea437/37686243685.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/841641aa-fb82-45b3-959c-c3282f8a4456/posubanepum.pdfIn PDF document text
    • https://s3.amazonaws.com/sosupejuxofedo/aggiornamento_android_asus_zenpad_10.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50c154e0-958d-4ae0-afcc-4a1efde24685/radarofuso.pdfIn PDF document text
    • https://s3.amazonaws.com/bopuxosavubare/waxem.pdfIn PDF document text
    • https://s3.amazonaws.com/kawotexulozax/getotejasalegewad.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_off0000c5e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5E5 5372 bytes
SHA-256: f40b393225b86361236517f301dcec7abd465b72ce36d5baf114004e4318ccc9
font_01_sfnt_off0000d7fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7FE 9996 bytes
SHA-256: ed0c274aa388ab77da10a3f4c0a6fc3338858ff9500824cc581f28a238fdac20
font_02_sfnt_off0000fa14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA14 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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