Malicious PDF — malware analysis report

Static analysis result for SHA-256 00fa548751e35e56…

MALICIOUS

PDF

91.6 KB Created: 2021-03-09 11:10:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: e86dc5b8cdab8149610d6e4f3f63a9ff SHA-1: 9d5f943da1bbb7e14d0965bacfd250af9fb4886d SHA-256: 00fa548751e35e567bae29f5d6560bc46a0a12ab4de1733b81b3a8b6083051ed
156 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, with heuristics indicating it contains a mass external PDF link farm and an embedded URI. The primary malicious URL, https://zajinet.ru/award?keyword=argonautika+script+pdf, suggests a phishing or scam attempt disguised as an award notification. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://zajinet.ru/award?keyword=argonautika+script+pdf PDF link annotation
    • https://waniritapi.weebly.com/uploads/1/3/0/7/130739375/ba66944ebd68f.pdfIn PDF document text
    • https://genolawibiwiz.weebly.com/uploads/1/3/4/3/134316454/nugufaradesiteres.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/donukadizolin/indian_constitution_amendments_list.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d15c08f-b1e3-4baa-a233-fd9a99b67815/job_interview_questions_and_answers_for_project_manager.pdfIn PDF document text
    • http://pagoxider.epizy.com/what_does_going_down_the_rabbit_hole_means.pdfIn PDF document text
    • https://s3.amazonaws.com/lekelepowo/ralijupufodijozetavubeki.pdfIn PDF document text
    • https://s3.amazonaws.com/purixifusipelid/48899521567.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0f9455e-d290-44ae-ba33-c50bf2dc595a/lovijeb.pdfIn PDF document text
    • https://s3.amazonaws.com/kevava/chiari_3_malformation_pictures.pdfIn PDF document text
    • https://s3.amazonaws.com/fosawef/sisopinaner.pdfIn PDF document text
    • https://s3.amazonaws.com/jefobexapulow/bed_bug_images_on_sheets.pdfIn PDF document text
    • https://s3.amazonaws.com/pewebopufupe/wajetovidenidekivow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9220d59d-6017-4fdc-b3e8-ae49d976744c/zoom_g5n_manuale_italiano.pdfIn PDF document text
    • http://bologipegokofi.epizy.com/abrahaminte_santhathikal_full_movie_hd.pdfIn PDF document text
    • https://s3.amazonaws.com/dudurat/idea_store_learning_course_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb0b7517-87c5-4cd3-907b-c412a8fddc83/39637796953.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d58c81c1-9c91-4759-ab73-0646f2998458/janome_hd1000_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94e45c7e-cb94-4d14-a5f8-a00c531a74d0/saruj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f3caa70-8abb-46a2-8d1b-638344fb9479/22306998261.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_off00011e7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E7F 5108 bytes
SHA-256: 2cf7153f81dbf7341d53407fbe36055f01c6051a94b9b5df821736c4def6c0c4
font_01_sfnt_off00012fe2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FE2 10440 bytes
SHA-256: 262d023019c6c8489837931b9763f065347ec0129f758a9c15c2495401ced3bd
font_02_sfnt_off000153a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x153A0 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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