Malicious PDF — malware analysis report

Static analysis result for SHA-256 de20cbff254353b3…

MALICIOUS

PDF

98.9 KB Created: 2021-03-25 10:52:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 47456dd51587b54744c6aa675a00ada6 SHA-1: 5518206e8464de7c609efdfe3da5febb2e751f98 SHA-256: de20cbff254353b3246d20211b3155d1251e8e105b1dbf776ddd38f9bc6e75fa
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 0.9989

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://midufefew.ru/award?keyword=tamil+to+english+spoken+english+pdf PDF link annotation
    • http://bexixibeguben.sportsontheweb.net/all_souls_cemetery_hours.pdfIn PDF document text
    • https://sowidokobixu.weebly.com/uploads/1/3/1/8/131856306/5c2aeb166ef93f9.pdfIn PDF document text
    • https://xuxixoxeniti.weebly.com/uploads/1/3/4/5/134585484/sasofanasimuba.pdfIn PDF document text
    • http://wozupabalaviv.medianewsonline.com/economist_may_2020.pdfIn PDF document text
    • https://giboritozi.weebly.com/uploads/1/3/1/3/131379296/6194384.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/vazisi/mumodo.pdfIn PDF document text
    • https://s3.amazonaws.com/tetofamuxulil/samsung_galaxy_s9_plus_unlocked_t_mobile.pdfIn PDF document text
    • https://6d4a8fb0-9a8a-4850-8aa1-2b5706121c9a.filesusr.com/ugd/ff2e72_90649da3c8754aebad89ac534772e28e.pdf?index=trueIn PDF document text
    • https://0a3c8164-ddd9-4522-8472-457ce31ece15.filesusr.com/ugd/d32f78_bcf00bf071fa4197b609b80498ff8564.pdf?index=trueIn PDF document text
    • http://gagelenobom.epizy.com/31109520049.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c18c2a4-1c26-4b12-8ebc-e7abb62eceb2/will_a_chamberlain_remote_work_with_marantec.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67f9463d-5e41-4b6e-af3f-a5ab1f5966d4/48037964948.pdfIn PDF document text
    • https://s3.amazonaws.com/fonazuzixagizir/57016265350.pdfIn PDF document text
    • https://c06d174a-caca-4ab2-b5a0-4525cd3135d4.filesusr.com/ugd/856cea_6f97d4cde01e4707ba0e694ab91287e4.pdf?index=trueIn PDF document text
    • http://pusapovewazigu.onlinewebshop.net/what_is_presumption_in_interpretation_of_statutes.pdfIn PDF document text
    • http://silapopo.epizy.com/horde_levelling_guide_wotlk.pdfIn PDF document text
    • http://toxodetu.rf.gd/film_minions_2015_subtitle_indonesia.pdfIn PDF document text
    • https://s3.amazonaws.com/guwutivupudutu/74469282262.pdfIn PDF document text
    • http://muraladufop.rf.gd/albahaca_usos_medicinales.pdfIn PDF document text
    • https://e20d271a-53e3-41f9-9180-d6cd5f9fd148.filesusr.com/ugd/6cfc61_e3b5eace0e3f48e79470dbcae53d6f30.pdf?index=trueIn 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e7ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7AD 11688 bytes
SHA-256: d5d08a4c8216f9ec4c210daf4dba38456dd0fde6d2ffe25c1559f1911c61f1b7
font_01_sfnt_off00010dca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DCA 5160 bytes
SHA-256: b0d8f8f9ea5635fb1340de3dae1db040fdaee8cf8c290c2df36af4be008f6e0b
font_02_sfnt_off00011f2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F2F 19612 bytes
SHA-256: 1861caac812c6c603a0a778ac4649f159bcadb06a89388890f5105f80496d6c7
font_03_sfnt_off00015807.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15807 16164 bytes
SHA-256: 6e3fbd491d8b71441998836ddca0d0c102716a221ea14f8143929167ad9a79b3
font_04_sfnt_off00016d1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16D1C 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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