Malicious PDF — malware analysis report

Static analysis result for SHA-256 20d576ee44d3dce7…

MALICIOUS

PDF

64.0 KB Created: 2021-02-16 19:27:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: a4a8b9fc5664d0242525b78347638d71 SHA-1: f5132fe24f520ce699c7086741f16b6e4d74045e SHA-256: 20d576ee44d3dce799bfa35d7785f1362f64c473aa23500443c5fc3ccfe82f2e
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. The embedded URLs point to various domains, suggesting an attempt to obscure the ultimate destination or distribute varied payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://jottigo.ru/wix?keyword=ma+notes+pocket+guide PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4454422/normal_600d6fdd137eb.pdfIn PDF document text
    • https://cdn.sqhk.co/dagufiwus/GpDjhje/samsung_galaxy_phone_email_notification_sound.pdfIn PDF document text
    • http://bezprovodov.guru/kivanebogolobuwimokng44m.pdfIn PDF document text
    • https://susutabum.weebly.com/uploads/1/3/4/4/134464128/3149575.pdfIn PDF document text
    • https://katozela.weebly.com/uploads/1/3/0/8/130874493/ac69c393.pdfIn PDF document text
    • https://cdn.sqhk.co/mebosuxular/HQIhax7/daxaxekefawawojodosej.pdfIn PDF document text
    • https://cdn.sqhk.co/tamoravuwera/fOghXid/dallas_stars_travel_hockey_league_schedule.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388163/normal_5fd8f4b8d1915.pdfIn PDF document text
    • https://cdn.sqhk.co/pilozarager/7idjjB7/18739516593.pdfIn PDF document text
    • http://pl50off.info/bimotozapusisizone3bbvz.pdfIn PDF document text
    • https://menaminalopu.weebly.com/uploads/1/3/5/3/135318725/zedemudixazumu.pdfIn PDF document text
    • https://cdn.sqhk.co/rizonozugaj/iszEhjs/marvel_contest_of_champions_download_mod_apk.pdfIn PDF document text
    • https://kubikogemovi.weebly.com/uploads/1/3/4/0/134095998/sujazuxujo-gevar-wiwub-mipuzamu.pdfIn PDF document text
    • http://arthromedro.xyz/bleacher_report_49ers_cardinals2tcjm.pdfIn PDF document text
    • https://cdn.sqhk.co/gebitasixa/hgjd0FK/73708412378.pdfIn PDF document text
    • https://cdn.sqhk.co/gipudeviwapi/dIHR3ha/enemy_strike_mod_apk_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447433/normal_600729898947d.pdfIn PDF document text
    • https://cdn.sqhk.co/jimumakevaji/rxhgggz/distance_meter_calculator.pdfIn PDF document text
    • http://cesaregaspari.com/rosario_de_liberacionc4lbn.pdfIn PDF document text
    • http://marketitaly.info/arcane_quest_legends_offline_rpga7uj8.pdfIn PDF document text
    • https://cdn.sqhk.co/munuluxel/hhytdhg/amazon_seller_support_hours.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421959/normal_601916311652f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000be72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE72 5180 bytes
SHA-256: 8860b3f4cbd42c9664267bafe1ce16488d7ec11e3f93b5020c78a174ae259d1c
font_01_sfnt_off0000d037.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD037 10088 bytes
SHA-256: 9b2073dc332e73d16fbdaeedf561b232f5489e9c568b07beae0e772283d885aa

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