Malicious PDF — malware analysis report

Static analysis result for SHA-256 7667072a4aff16e3…

MALICIOUS

PDF

76.5 KB Created: 2021-03-30 16:22:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: b8cbb71ca14606f306d350353881f050 SHA-1: 6b476e5ae36fdff223b2d460231917f6313c5a97 SHA-256: 7667072a4aff16e3fafed2e4567bda6fbfecd9a332e31a10ef7283acf1ac2a75
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs pointing to disposable domains, suggesting a link farm or phishing campaign. The document body, though heavily obfuscated, contains keywords related to business processes, likely serving as a lure to disguise the malicious intent of redirecting users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 5

  • 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 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/award?keyword=business+process+reengineering+examples+pdf PDF link annotation
    • http://femaxewife.getenjoyment.net/87902885701.pdfIn PDF document text
    • http://parkji5x.xyz/56503856315wnw57.pdfIn PDF document text
    • http://kutatit.getenjoyment.net/46150376365.pdfIn PDF document text
    • http://doordash.link/51251568815oly1r.pdfIn PDF document text
    • http://instgramcopyrightdispute.com/the_devil_is_a_part_timer_light_novel_ending8b3cc.pdfIn PDF document text
    • http://mybiol.site/57543307870z4cup.pdfIn PDF document text
    • http://insuranceautousa.com/chartered_financial_analyst_membershipqxfg5.pdfIn PDF document text
    • http://kezijumedet.mypressonline.com/accounting_ledger_form.pdfIn PDF document text
    • http://wewogokuwidu.mywebcommunity.org/rijosuwalivet.pdfIn PDF document text
    • http://look-hotel.com/ironing_sheets_quicklyki023.pdfIn PDF document text
    • http://jajokojunewi.mypressonline.com/hemagglutination_inhibition_test.pdfIn PDF document text
    • http://auth02mobility.com/9188358700q17fg.pdfIn PDF document text
    • http://omshop.space/wupapdznor.pdfIn PDF document text
    • http://tumijosejagag.22web.org/interesting_facts_about_samuel_beckett_bridge.pdfIn PDF document text
    • http://prizinsta.site/wizusuderulopaboxezavewev2o5q1.pdfIn PDF document text
    • http://fosipuzo.mypressonline.com/bribery_in_malaysia.pdfIn PDF document text
    • http://kidupat.getenjoyment.net/lejuk.pdfIn PDF document text
    • http://nedavupagisezim.mygamesonline.org/womonalumunebinokul.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jokubamobivavum.onlinewebshop.net/surumofofufufa.pdfIn PDF document text
    • https://66f9c2bc-82a6-463d-9ccd-9c94d3d8805e.filesusr.com/ugd/b361c6_03521abf76ee44d8b7f1bd2d32717aae.pdf?index=trueIn PDF document text
    • https://f733e552-90a1-4d1f-83ca-a6b36afcf31c.filesusr.com/ugd/38bf1f_8bfe6c8a88b44368b1ec540c75ece094.pdf?index=trueIn PDF document text
    • https://b064d0e4-88d6-4b7e-8087-8ebf790fcba6.filesusr.com/ugd/ca32a8_c69e06242c5c40dc99d137ff870e1c23.pdf?index=trueIn PDF document text
    • http://pikizopesoru.rf.gd/10561179213.pdfIn PDF document text
    • https://8c17aa34-c454-4d6c-a218-8929c845e329.filesusr.com/ugd/808cd0_ba74b395e4ac4312a2704336290e7b47.pdf?index=trueIn PDF document text
    • http://vowurereluvox.epizy.com/5_ways_to_convince_someone.pdfIn PDF document text
    • http://vewawisu.onlinewebshop.net/2031520626.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_off0000edd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDD3 5592 bytes
SHA-256: 39b348171a8651de0fe21c0e55ae6a1599918007bc0d2e4243e23b4b69803678
font_01_sfnt_off000100d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100D0 10508 bytes
SHA-256: a09bfe62f287c8825aaf7bfb6edf23633cd88aa777f35f3beafa0c4d64c248e2

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