Malicious PDF — malware analysis report

Static analysis result for SHA-256 70434020a9722820…

MALICIOUS

PDF

91.1 KB Created: 2021-03-04 21:30:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 829e20f6b05c825c1ce38d13c7a4ce53 SHA-1: e20f84690f095c28063d16abf6c3812b35dffa67 SHA-256: 70434020a97228200066e40a45d92d1106c102b7dd0ef9ffde5f26bebcd4748b
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable domains and are flagged as a link farm. The primary URL, https://jumiwimov.ru/wix?keyword=welding+belt+buckle+for+sale, is presented in a way that suggests a sales listing, likely a lure. The ML classifier and ClamAV detection strongly indicate malicious intent, consistent with phishing or malware distribution.

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://jumiwimov.ru/wix?keyword=welding+belt+buckle+for+sale PDF link annotation
    • http://paxezimusosesa.scienceontheweb.net/87224930893.pdfIn PDF document text
    • http://dimoguzix.iblogger.org/35669118395.pdfIn PDF document text
    • https://cdn.sqhk.co/tivanosox/m1ihdp4/tubajelefumapen.pdfIn PDF document text
    • http://tuwasukam.getenjoyment.net/leremoz.pdfIn PDF document text
    • http://sejapamuji.22web.org/boputisogavon.pdfIn PDF document text
    • https://cdn.sqhk.co/vasozaponem/aMz6PgB/13814489549.pdfIn PDF document text
    • http://venatukuberelo.iblogger.org/fazagumagope.pdfIn PDF document text
    • https://cdn.sqhk.co/xedufoga/d4qjeov/13867700343.pdfIn PDF document text
    • http://budokudepa.scienceontheweb.net/74084881742.pdfIn PDF document text
    • http://rijexofugovu.medianewsonline.com/casio_protrek_watch_set_time.pdfIn PDF document text
    • http://lasofetuxig.22web.org/income_tax_calculation_sheet_format.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zitadufafasid.onlinewebshop.net/vitiguboba.pdfIn PDF document text
    • https://s3.amazonaws.com/xazarujokemus/konsep_bilangan_rasional_dan_irasional.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ebe8529-f0a8-4f6a-a30c-051686d072ed/what_is_the_meaning_of_chinese_laundry.pdfIn PDF document text
    • https://s3.amazonaws.com/neviwove/mazefedamerar.pdfIn PDF document text
    • http://bebovufuvuji.myartsonline.com/lifupiviwuwadijularobof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/041b64c5-268a-4c38-a347-47bc556af061/up_from_slavery_movie.pdfIn PDF document text
    • http://pulutugorivexek.atwebpages.com/project_management_tools_and_techniques_list.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6044e936-824d-4619-82b3-777c0afa8153/zumotejijukudemevob.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011bdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BDF 3724 bytes
SHA-256: 6c634b1765c2408ac91c1f8ee52ec2368beb7d9bd18855c7fe92ef956582e0fe
font_01_sfnt_off00012920.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12920 5408 bytes
SHA-256: 88a802dafa6f968f7303c4ca1fa66642b0df12c58441d5f470e1eac19cbb29d7
font_02_sfnt_off00013ba7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BA7 10136 bytes
SHA-256: 3065a77dccb68cfa1ed982a31475b8c91a7b77c9ecc09a3d98533ce3a3211d87

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