Malicious PDF — malware analysis report

Static analysis result for SHA-256 67e37d39b60f207f…

MALICIOUS

PDF

72.3 KB Created: 2021-03-25 06:26:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 799245f472ae4ca6f38649da86421a1d SHA-1: f56fccb961badf522e01627510d21b01e01347fd SHA-256: 67e37d39b60f207fc633cd201de451fce4f17fcc83cb7fe5e701aa92131a3fa8
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 0.9995

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://dafemum.ru/award?keyword=caltrans+standard+specifications+2020+pdf PDF link annotation
    • https://zenijubam.weebly.com/uploads/1/3/4/8/134884092/doverajagekitumur.pdfIn PDF document text
    • https://lukafitujukeme.weebly.com/uploads/1/3/3/9/133997152/fejodilaxagow_mudokitu_gogodotepu.pdfIn PDF document text
    • http://retoxen.mypressonline.com/msc_bellissima_deck_plan.pdfIn PDF document text
    • http://roxelejabojafe.scienceontheweb.net/asme_b16._34_download.pdfIn PDF document text
    • http://kovuzaxaf.medianewsonline.com/getimazotisolugifit.pdfIn PDF document text
    • https://fugopezawisobib.weebly.com/uploads/1/3/1/3/131383650/1604291.pdfIn PDF document text
    • http://xoruresifif.iblogger.org/86405954510.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/gotenukevepunin/19199109969.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d90e03f0-2038-4e4e-a1fe-cf511a64bf1c/zinoxoranujesifere.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08a69640-dfa8-4c49-bae4-0e82da315e2c/11761372251.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0fd8f039-7e9e-4ab4-8aab-cbcbac64a6ef/positive_psychology_exercises_3_good_things.pdfIn PDF document text
    • https://s3.amazonaws.com/seriposuj/reasoning_aptitude_test_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/tobovunoberiki/tiffany_ring_size_guide_uk.pdfIn PDF document text
    • http://zotijoxamofos.epizy.com/suzetunozigixizuzet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1390e547-76f0-426b-b9dc-f1c14416a6a0/71787704675.pdfIn PDF document text
    • https://s3.amazonaws.com/posufij/what_is_the_story_the_last_leaf_about.pdfIn PDF document text
    • https://s3.amazonaws.com/wupiwupiwot/railway_platform_ticket_fine_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/xokebore/zewezixokiwonovosa.pdfIn PDF document text
    • http://tutunod.epizy.com/nijomavuzesis.pdfIn PDF document text
    • http://pifaramurul.rf.gd/furry_ref_sheet_maker.pdfIn PDF document text
    • https://s3.amazonaws.com/gezejoputiwinu/english_movies_mp4_2017.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9966f03-6ea1-46b9-b88b-f8aeed78f09b/zinusaledidotepawafir.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_off0000dbfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBFC 5328 bytes
SHA-256: f06266986377e95dfe23f80f95c23bca12cf94b815f78a80fe0a69d5c8efb6b4
font_01_sfnt_off0000ee25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE25 10428 bytes
SHA-256: a1bb15686d45ee545dfacde697fe4430eaa311c5d9fc1b8d8e9cc003f80b565d

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