Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbea560d8db967ea…

MALICIOUS

PDF

90.6 KB Created: 2021-05-09 11:50:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 1fcf889609db288bfb7aa6f57a759b7f SHA-1: e8fe5dc0a3fe79e0279d56ee383ed2801ea4c53d SHA-256: dbea560d8db967ea5597cf9343395d5a0e6f060e18c9e3f789d38d097ced76ff
186 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many pointing to disposable domains and link farms, indicating a phishing or malware distribution attempt. The document's content and structure, along with ClamAV detection and ML classification, strongly suggest malicious intent. The embedded URLs are likely used to redirect users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://maypoin.ru/strik?utm_term=diablo+3+necromancer+trag%2527oul+build+mage PDF link annotation
    • https://cdn.sqhk.co/xidizizo/cErgd6Z/sakizejesesorebixetonus.pdfIn PDF document text
    • http://malowatava.iblogger.org/pete_the_cat_and_his_four_groovy_buttons_printables.pdfIn PDF document text
    • https://cdn.sqhk.co/kirovuwuvo/aF3hwCL/word_blocksatz_letzte_zeile_nicht.pdfIn PDF document text
    • https://cdn.sqhk.co/rapovixovuti/dvahhOG/44100475006.pdfIn PDF document text
    • https://cdn.sqhk.co/sovanoniwuva/skkFjjw/fireman_sam_coloring_pages_free.pdfIn PDF document text
    • https://cdn.sqhk.co/rajemaramiw/bSifGB8/hidden_agenda_ps4_game_review.pdfIn PDF document text
    • http://sofebitaxed.iblogger.org/rule_mate_1500_bilge_pump_manual.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/c1258915-cd20-48dd-bbfd-b3bacaacd0e6/fupifuzefojuwevujujapaku.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b77b737-34c5-4002-88b8-6512325a0577/kibotepem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1d36c7b-8487-4a18-9dbd-ed829c2c0325/rinas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a6ff9db-82f1-481f-99e3-785508db741e/juzawodoboluxumeledo.pdfIn PDF document text
    • http://febegisavim.rf.gd/nelonatujedosolutominuru.pdfIn PDF document text
    • https://3ae4d138-4ba3-4962-98fb-1b98b40a6a82.filesusr.com/ugd/38062a_38b3cd7deef644ffa8db77a8fb73a951.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/4616321f-fa7a-4b75-b0df-269c793122bd/3_dimensional_shapes_worksheets_7th_grade.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b625b7f4-09c8-4a73-b48a-1fa397cae304/how_to_get_a_tight_knot_out_of_string.pdfIn PDF document text
    • http://risogida.rf.gd/ethiopian_orthodox_film_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/192e90eb-9481-4102-ac6e-99e8808353ce/zupefokuzefe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/626ecdfd-f01f-4eaa-a5ae-04a06dd959b8/5931972475.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d16af08-672a-4084-aa21-61d821610e6a/i_want_to_learn_english_speaking_online_free_video.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb0c4876-e2b1-42c5-a6ad-5dd11f182d08/38087611947.pdfIn PDF document text
    • https://77a5c3e7-429a-4f60-ad30-886abaef4f6e.filesusr.com/ugd/07a1ab_145de17e69cc408b9e0cdb32f3632972.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/dcd1710a-87b4-47d6-af3d-ed2bb3f4647f/tilovoruxefezakusa.pdfIn PDF document text
    • https://b5c90759-dbf8-4ccd-b12d-e23c958527f9.filesusr.com/ugd/915a55_a423115b583d4f639536a195ba1936e3.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012194.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12194 5420 bytes
SHA-256: c7338f06bbf47e55bf4bbda94462907002e531c92649983de77feacde1c580f4
font_01_sfnt_off000133ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133ED 11632 bytes
SHA-256: 1a93268bc2d92dabd25285ac99d8417cedac62dfec138c4ca765f2f437d9d442