Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2265a49a17ec531…

MALICIOUS

PDF

75.3 KB Created: 2021-04-21 16:08:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: cb9991b10fd21b0c77a8fa1e1e1c237b SHA-1: 23d2d737d9c48d27fce44fc9092a83651a4b79aa SHA-256: b2265a49a17ec5316df5a1139c6532b3cbb854581b12dbc2432c6ddbd5961062
126 Risk Score

Malware Insights

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

The PDF contains embedded URLs that redirect to link farms and disposable hosting, indicative of a phishing or scam attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URIs point towards a social engineering attack designed to drive traffic to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://maypoin.ru/strik?utm_term=how+to+set+pioneer+car+stereo+clock PDF link annotation
    • http://copyrighthelpbusiness.net/77781116067zwy2p.pdfIn PDF document text
    • http://cafechorsu.ru/how_to_take_apart_a_kenmore_500_washing_machinez0vpp.pdfIn PDF document text
    • http://motuxagajoweji.22web.org/fetabekokojetovep.pdfIn PDF document text
    • http://ompala.store/voxarevetelbmkn.pdfIn PDF document text
    • http://tuzirawejaw.mypressonline.com/bansal_classes_biology_study_material.pdfIn PDF document text
    • http://runojiwum.getenjoyment.net/zumirubujobuvikipi.pdfIn PDF document text
    • http://funseeds.site/who_is_the_richest_boxer_of_all_time4bbji.pdfIn PDF document text
    • http://libralab.digital/taxemaxopofozegusepamalxfckn.pdfIn PDF document text
    • http://mufutekuson.getenjoyment.net/what_is_your_zodiac_sign_if_your_birthday_is_in_august_28.pdfIn PDF document text
    • http://world-wild-shop.com/my_life_next_door_sequeljzibv.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bogeguva/save_the_cat_she_ra_script.pdfIn PDF document text
    • http://mamotupot.rf.gd/ardea_real_outcome_fund_performance.pdfIn PDF document text
    • http://gifidabula.atwebpages.com/76083638807.pdfIn PDF document text
    • https://s3.amazonaws.com/nagev/wiselisorovakanuwexix.pdfIn PDF document text
    • http://kofodubelo.rf.gd/what_is_the_top_rated_robot_vacuum.pdfIn PDF document text
    • http://dunixojojulif.epizy.com/kiminovawexijuxutike.pdfIn PDF document text
    • https://s3.amazonaws.com/vebogotexaf/dallah_albaraka_group_annual_report.pdfIn PDF document text
    • http://mutifesojare.epizy.com/69308012765.pdfIn PDF document text
    • http://komadolosa.rf.gd/dizoriro.pdfIn PDF document text
    • http://bevonox.epizy.com/emancipation_proclamation_worksheet_gilder_lehrman.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_off0000eb20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB20 5044 bytes
SHA-256: 82d40e242998776a2169dd4dbaedc5f92545c783284efe1a8a32075061dabb2c
font_01_sfnt_off0000fc69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC69 10456 bytes
SHA-256: a30740e65953cd2a69ef3ec26fedee3ded2d83c393515e23073cd7ec22cd922c

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