Malicious PDF — malware analysis report

Static analysis result for SHA-256 aeddb0ece3ef3bb2…

MALICIOUS

PDF

64.4 KB Created: 2020-12-18 20:40:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3d978f60dfc908a0b625126dbbc8a3cb SHA-1: 1aea27a61ab93f27b5c2bbd955954c4d258685e8 SHA-256: aeddb0ece3ef3bb2e5c3a40fc68ac1baca1892294e868512a6d5bd816cb7ed0a
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to other PDFs, indicating a link farm or SEO spamming technique. One of the primary external links, 'https://trafffe.ru/strik?utm_term=table+topics+ideas', is likely a phishing or malicious landing page. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://trafffe.ru/strik?utm_term=table+topics+ideas
    • https://dozasasakebo.weebly.com/uploads/1/3/1/1/131164234/puzabawilodiluna.pdf
    • https://sewimoranekodov.weebly.com/uploads/1/3/0/9/130969375/xuretusukobuda.pdf
    • https://kenodijegubiv.weebly.com/uploads/1/3/4/5/134501598/guxiled-mejafij-guvugeba.pdf
    • https://ganusanawopat.weebly.com/uploads/1/3/4/4/134488834/puwapamigikako_wolinexivinalek_xixojukopig.pdf
    • https://xefafarorul.weebly.com/uploads/1/3/4/6/134698093/4384939.pdf
    • https://tarebizadutobi.weebly.com/uploads/1/3/4/3/134310067/vevese.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/906a714b-6130-41c3-b4d1-2ed4973919c3/night_and_day_jacob_and_renesmee.pdf
    • https://uploads.strikinglycdn.com/files/a1b55369-303a-4339-aba9-6e60832307d8/logamowedej.pdf
    • https://uploads.strikinglycdn.com/files/db653511-1221-44ec-8780-e54ddd768f1e/unblocked_games_66_electric_man_3.pdf
    • https://uploads.strikinglycdn.com/files/e784df0f-4ba8-4609-94fa-55daa8f2002f/57713488355.pdf
    • https://uploads.strikinglycdn.com/files/7ff0e480-8c09-4f64-ae96-3e7544df1822/broadcasting_cable_the_internet_and_beyond_7th_edition.pdf
    • https://uploads.strikinglycdn.com/files/26c8271b-3c2e-41bc-a182-3733c89fbf82/bomuzelutidukez.pdf
    • https://uploads.strikinglycdn.com/files/f02415bc-83d3-46ba-8725-ae655decd362/cross_my_heart_chords_george_strait_no_capo.pdf
    • https://uploads.strikinglycdn.com/files/15046854-8d5c-4ab2-ab33-6ae8e2ccfc3d/patches_pee_movie_list.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b416.bin
7aa50f23f6d2aac027ab8faabf8baa4e4914426436c30f5febe7557cf847b55d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB416 4744 bytes
font_01_sfnt_off0000c432.bin
ed550941b2ef1a87ef409bb50ac0c48bf05d8d0f263e08f63d3b86256ee0bc04		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC432 10556 bytes
font_02_sfnt_off0000e730.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE730 4324 bytes

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