Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba0085381bdd0dd5…

MALICIOUS

PDF

81.6 KB Created: 2021-03-23 00:15:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: e56a6b71f9a8a48bb30164a42a7f518b SHA-1: 9e2ebb84ceaa4851787374a0be714527c92ad08f SHA-256: ba0085381bdd0dd524fbfab9bda240de4c0ac9d1545c6d83005734917be3ce9e
126 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains numerous URLs, many of which are hosted on disposable domains and appear to be part of a link farm designed to obscure the true destination. The document body, though heavily obfuscated, contains text related to free PDF downloads, aligning with a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

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://zajinet.ru/award?keyword=bodybuilding+exercises+pdf+free+download PDF link annotation
    • https://dafubadam.weebly.com/uploads/1/3/0/8/130874240/5614382.pdfIn PDF document text
    • http://fanisore.sportsontheweb.net/who_was_the_first_person_to_view_the_walls_of_the_cellar.pdfIn PDF document text
    • http://sportita.fun/84876757890f2bt6.pdfIn PDF document text
    • http://newyearshop.site/defulagupidetapipunemivumc2zi2.pdfIn PDF document text
    • http://nuveclovet.xyz/caracteristicas_de_la_figura_literaria_personificacionx44qa.pdfIn PDF document text
    • http://duwinijuj.mypressonline.com/45931507302.pdfIn PDF document text
    • http://xikumidevulofo.iblogger.org/lash_extension_care_guide.pdfIn PDF document text
    • http://mofemaruwek.sportsontheweb.net/noseno.pdfIn PDF document text
    • http://saripituxupagek.sportsontheweb.net/1706982303.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387061/normal_6033f71144bed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404105/normal_601081c1a1174.pdfIn PDF document text
    • http://bettermoneytips.com/57978297390dyyte.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468820/normal_6050d02129121.pdfIn PDF document text
    • https://rezemofojo.weebly.com/uploads/1/3/5/3/135321986/sukojilasamaxolegesa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465127/normal_60463da1d55b3.pdfIn PDF document text
    • http://bapatavusirave.mygamesonline.org/gotajudekajar.pdfIn PDF document text
    • http://creditscorefix.info/wabanu1mzla.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389127/normal_6015845f40899.pdfIn PDF document text
    • http://opit.space/54623419628hpj1w.pdfIn PDF document text
    • http://believes.space/85437541926053ud.pdfIn PDF document text
    • http://ziwumaguvogog.iblogger.org/shark_attack_video.pdfIn PDF document text
    • http://blekrossi.ru/67129912196kwjj7.pdfIn PDF document text
    • http://twirlini.com/89994068690gd6sw.pdfIn PDF document text
    • https://juladugalevatib.weebly.com/uploads/1/3/4/3/134385664/tewewexivirulijugu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://meguribezupi.epizy.com/tefexokeped.pdfIn PDF document text
    • http://tixuranezusox.epizy.com/deliberao_cee_73_2020.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_off0000fffb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFFB 5772 bytes
SHA-256: 2d9bc19851d809d6b74c8204bea7350a0de213cae4a473ba9b1282e89930b76c
font_01_sfnt_off000113d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113D4 11000 bytes
SHA-256: 0f26ffde8cb4e914403fb882500bfc8108e56ab433ace3a89cd5274872b8244b

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