Malicious PDF — malware analysis report

Static analysis result for SHA-256 67466986a86bb1f4…

MALICIOUS

PDF

69.4 KB Created: 2021-03-15 17:45:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: da521fbcfb875c7883ccc24e9e3e1dda SHA-1: a967a5a744e93e11332141f4171e6dda1be010cb SHA-256: 67466986a86bb1f43ef9b8664c16c1ee4e21f370a5640a79666c2dc3758b5bc0
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs, with a primary one pointing to 'golowaki.ru', suggesting a redirection to a malicious site. The document body, though heavily obfuscated, contains text related to 'rug doctor professional' and 'wkhtmltopdf', likely a lure to disguise the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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 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://golowaki.ru/strik?utm_term=how+to+use+a+rug+doctor+professional PDF link annotation
    • https://tonituligavu.weebly.com/uploads/1/3/4/8/134884188/baa580.pdfIn PDF document text
    • https://cdn.sqhk.co/jokalirubore/jxiehh3/can_i_slice_meat_in_a_food_processor.pdfIn PDF document text
    • https://cdn.sqhk.co/nugopanage/jqhhgEz/krosmaga_the_wakfu_card_game.pdfIn PDF document text
    • https://gadebalemalun.weebly.com/uploads/1/3/4/4/134443756/bekenotejepi.pdfIn PDF document text
    • https://cdn.sqhk.co/turomixo/ffahf1Y/terumepugekusexopovimupu.pdfIn PDF document text
    • http://mujubow.getenjoyment.net/7467300431.pdfIn PDF document text
    • https://vetafewilede.weebly.com/uploads/1/3/1/4/131408572/824cb0ea.pdfIn PDF document text
    • https://pulapafux.weebly.com/uploads/1/3/0/8/130874232/8435673.pdfIn PDF document text
    • http://rimujitibux.mypressonline.com/sewibotakeba.pdfIn PDF document text
    • http://niwizonoleror.mywebcommunity.org/44046252759.pdfIn PDF document text
    • https://juwibaviwexufeb.weebly.com/uploads/1/3/0/7/130739975/32acef.pdfIn PDF document text
    • http://tadudibelebow.iblogger.org/fountas_and_pinnell_lexile_correlation_chart_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/gasajolop/icjd5jj/61954245704.pdfIn PDF document text
    • http://mosuzovopij.22web.org/fotevazirejifinoziluber.pdfIn PDF document text
    • http://pexawegowe.mywebcommunity.org/dozafonuvuzowobino.pdfIn PDF document text
    • https://cdn.sqhk.co/niramojiga/haibhiR/12144121217.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/a1e099ef-ac5c-4af2-bb07-074c448090e3/bilemejelatufimutibikixu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30a7a66a-cb41-4a23-b25b-866ad6fb6deb/composite_functions_worksheet_with_answers_kuta.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1630ccc2-6870-4a96-bafd-5d3e1ebde986/where_is_bob_evans_sausage_processed.pdfIn PDF document text
    • https://s3.amazonaws.com/wurivuve/vajawu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05781e36-4514-4570-a416-a9c7b60a3d43/25971050439.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b596337b-ef51-4067-b813-2f7b507202e6/mofefemepaze.pdfIn PDF document text
    • https://s3.amazonaws.com/kovilowab/averta_web_font_free.pdfIn PDF document text
    • https://s3.amazonaws.com/tikoweravisixu/51267729047.pdfIn PDF document text
    • http://baxewape.myartsonline.com/nijelodavu.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_off0000d294.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD294 5376 bytes
SHA-256: 1f305a4e6066564ebf64480f8f91a75877be2876181fc95f61bd15c0d8ba4700
font_01_sfnt_off0000e4fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4FD 10292 bytes
SHA-256: 53346ef58b2d2679997838251036fa55a3c01643d9550ee37a7ddfbc6b6cb84f

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