Malicious PDF — malware analysis report

Static analysis result for SHA-256 e05f9bba43d32263…

MALICIOUS

PDF

69.1 KB Created: 2020-11-25 15:44:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 1f11a9bf7d83cae22ea19dafaad7cf2e SHA-1: 607d01a66330c5cb2e5042b8827087c6a6af9830 SHA-256: e05f9bba43d32263e72382a5f1396fa25dcdd1292ee34f2eceed8ea454f97758
104 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous external links, with a critical heuristic identifying it as part of a link farm. One of the primary URLs, 'https://trafffi.ru/aws?utm_term=gb+whatsapp+beta+version', suggests a lure related to WhatsApp beta versions. The presence of a visual download button heuristic further supports the idea of a deceptive download attempt. While no scripts were extracted, the overall structure and heuristics strongly indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://trafffi.ru/aws?utm_term=gb+whatsapp+beta+version PDF link annotation
    • https://bapiribudiwapik.weebly.com/uploads/1/3/4/8/134885568/gaguli.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393626/normal_5fa77443b1ad9.pdfIn PDF document text
    • https://visobugogo.weebly.com/uploads/1/3/4/5/134582963/8418453.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425504/normal_5fa75bcb89ef3.pdfIn PDF document text
    • https://siziloxa.weebly.com/uploads/1/3/4/7/134747516/582710de2c3e.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/xakusineba/wuduwobovizi.pdfIn PDF document text
    • https://s3.amazonaws.com/lomogas/gibuwukodifijubenomakak.pdfIn PDF document text
    • https://s3.amazonaws.com/bupaxomu/59694672662.pdfIn PDF document text
    • https://s3.amazonaws.com/fejenijovekozu/neboxazu.pdfIn PDF document text
    • https://s3.amazonaws.com/lusegokaves/diviser_un_en_plusieurs_parties.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97c0eecc-325d-4e80-b14f-7def7b32b1a8/62747485702.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e228813-b263-4283-aceb-dd0408b277e6/98568207365.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_off0000d394.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD394 5200 bytes
SHA-256: f5419d5da60a4119e980022ee5e5ec56b605a2d97664644f40859853c4f0f676
font_01_sfnt_off0000e551.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE551 10120 bytes
SHA-256: 7b59e9b16b6b63e168369b507ac888aae9f842799d45a71de3c235d7dafe7774

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