Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8d5ac372cbf6ef2…

MALICIOUS

PDF

79.7 KB Created: 2021-03-15 07:59:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 90c220d398e12d19c34acc352cca8c69 SHA-1: 6480f3236ce949d64d1f5f8099b1b1fd39d97e14 SHA-256: f8d5ac372cbf6ef2cc7db9db367eae42727edbf942afcfed7bad462510036228
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The sample was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, with a primary suspicious URL pointing to 'soxebez.ru'. The PDF structure and embedded links suggest an attempt to redirect users to potentially harmful content, aligning with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://soxebez.ru/wix?keyword=khatrimaza+bollywood+movies+2019 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4486565/normal_5ff33a90068a2.pdfIn PDF document text
    • http://egrn-order.online/63393467894j5pi.pdfIn PDF document text
    • http://lukosewikaj.22web.org/83209364614.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473322/normal_601eecd3a29e9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375340/normal_5fdc3e5371dcb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449605/normal_604507bebdd4c.pdfIn PDF document text
    • http://reduslim-shop.website/29799244005958si.pdfIn PDF document text
    • http://muzhskoizhurnal.ru/428490061518qwqs.pdfIn PDF document text
    • http://evatopshop.xyz/biblical_hebrew_grammar_wikipediaufiio.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lonelogu.epizy.com/all_gta_games_cheat_codes.pdfIn PDF document text
    • http://kakoxoduruze.epizy.com/42543566728.pdfIn PDF document text
    • http://jopuzasoxu.rf.gd/jevaxara.pdfIn PDF document text
    • http://xidetume.rf.gd/51452721408.pdfIn PDF document text
    • https://s3.amazonaws.com/faluzotixupi/sa_national_lottery-_funding_application_forms.pdfIn PDF document text
    • https://s3.amazonaws.com/suzujewa/fulirigoj.pdfIn PDF document text
    • https://s3.amazonaws.com/zuwosil/xadewizofelezuz.pdfIn PDF document text
    • http://bowuxok.epizy.com/29017803984.pdfIn PDF document text
    • https://s3.amazonaws.com/pusixa/gafovikag.pdfIn PDF document text
    • http://duletufazipup.epizy.com/9262442697.pdfIn PDF document text
    • https://s3.amazonaws.com/divikufifir/79147570381.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_off0000f84d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF84D 5960 bytes
SHA-256: af510edb6ea3bd62fe82473e684c29d8505f3e3e452b7d23de536fbd56a9e202
font_01_sfnt_off00010c8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C8C 10788 bytes
SHA-256: b896dadb51e5e011fa091b1338ebe89de98f0dd3d3202a5558a451a88907acc8

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