Malicious PDF — malware analysis report

Static analysis result for SHA-256 36e00213ebf38de8…

MALICIOUS

PDF

69.7 KB Created: 2020-11-11 22:21:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 58feee055b2f98663064fbefc8792478 SHA-1: bad72f7d0a3e342326ef9cbd4d59c6dc3d697708 SHA-256: 36e00213ebf38de858ff46871b181070a34f642c3faae3c74213079b64360b15
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of external links, identified as a link farm. One of the embedded URLs, 'https://trafffi.ru/123?utm_term=my+time+at+portia+fertilizer+machine', is directly associated with the PDF's content. ClamAV and ML heuristics flagged this PDF as malicious, specifically as a phishing trojan. The presence of embedded URLs and the link farm structure suggest an attempt to redirect users to potentially malicious sites.

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
  • 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://trafffi.ru/123?utm_term=my+time+at+portia+fertilizer+machine PDF link annotation
    • https://puwexisafiza.weebly.com/uploads/1/3/4/5/134586360/joraxamutux.pdfIn PDF document text
    • https://gixawixo.weebly.com/uploads/1/3/4/3/134322292/6cf41.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/783c57bf-dc33-4057-83a4-fa06f3bfbc10/funny_memes_for_kids_no_words.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c567aa41-584f-4f4d-8149-53707906ad2c/83516779986.pdfIn PDF document text
    • https://s3.amazonaws.com/dadupawo/the_reasonableness_of_christianity_as_delivered_in_the_scriptures.pdfIn PDF document text
    • https://s3.amazonaws.com/juduk/naruto_fan_made_2020_cartoon_network.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c8edd36-6f76-4b45-9b35-7a5651ff7728/nabamijowekojefibirefuku.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f153feda-2b44-457b-8081-20bdf536c706/8456912935.pdfIn PDF document text
    • https://s3.amazonaws.com/mozirolinitaje/chemistry_pogil_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/zidosozawok/63024860890.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c89b3eef-4244-4dd6-a4e3-4a0e1c095123/65900866810.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79f93730-d043-4401-bc44-522dd5e1c2ee/53001870125.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/073e4067-e301-4a8c-9a9c-f70160c7b9f8/7222158601.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5f6dce5-dc52-4075-bb57-2822a8f1824d/98332362307.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d530.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD530 5236 bytes
SHA-256: 0023e547cafb3d12f967f6e29ee95e0fcb63196d47a6add3bc257e03365c8c9a
font_01_sfnt_off0000e6f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6F0 10228 bytes
SHA-256: c3e3b9bf28a03f3fcfbcd80a4cea4904e09c222e037649061a58d5794b3de303

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