Malicious PDF — malware analysis report

Static analysis result for SHA-256 b099b8e00859e3a2…

MALICIOUS

PDF

68.6 KB Created: 2021-02-18 00:57:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: c11f0251ed5bce3cb2704b6579b692b6 SHA-1: aff5fdb5cad4050eeffcbfeab3df407bba308686 SHA-256: b099b8e00859e3a224ef89b26c8b51154e8ff2683ace80d565a9cc734b2e93db
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://baarspo.ru/wb?keyword=optiplex%20760%20upgrade%20ram PDF link annotation
    • https://cdn.sqhk.co/wogebebaruro/hjjchbW/22629042750.pdfIn PDF document text
    • https://cdn.sqhk.co/nujamuxeg/hjijG5E/ruvuzerunazevesenivigujej.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489740/normal_6003f9eadf067.pdfIn PDF document text
    • https://cdn.sqhk.co/kepebeso/eEFgcjh/weaphones_gun_sim_free_vol_1_apk_download.pdfIn PDF document text
    • https://paparudedolenod.weebly.com/uploads/1/3/4/6/134686514/2801478.pdfIn PDF document text
    • http://dudisigufazalu.22web.org/escape_from_the_western_diet_michael_pollan_they_say_i_say.pdfIn PDF document text
    • https://cdn.sqhk.co/waxipefimafa/UiheTgd/fowinizaxefakoj.pdfIn PDF document text
    • https://toraboretopupu.weebly.com/uploads/1/3/4/7/134769369/4e03c2eeffc101.pdfIn PDF document text
    • https://cdn.sqhk.co/fajaleniwa/Fhao26d/72268210991.pdfIn PDF document text
    • https://cdn.sqhk.co/daxerarugak/d5AhbXN/8320719120.pdfIn PDF document text
    • https://fikuvigobe.weebly.com/uploads/1/3/4/5/134582673/2860740.pdfIn PDF document text
    • http://lorenbayi.com/wiwogotanujowalujeredezufmnm4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vobuxex.epizy.com/catalogue_toto_2019.pdfIn PDF document text
    • http://vugapadilubokis.epizy.com/long_term_causes_of_ww1.pdfIn PDF document text
    • http://betelenederope.epizy.com/organizational_agility_definition.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_off0000cb97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB97 5572 bytes
SHA-256: aaed64f1097757314b7d0c289602e3a3cff1e1f69577e70a8f901c46b9056f7a
font_01_sfnt_off0000de86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE86 11492 bytes
SHA-256: e6e48cc8fe0232ad2c438dd45b15346aba50bf89fa37b324839ea7223d85d2f2