Malicious PDF — malware analysis report

Static analysis result for SHA-256 79f329f3a844ced7…

MALICIOUS

PDF

75.7 KB Created: 2021-04-28 21:25:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: f0be0520abda7ecbcb376c1c9e2f07bf SHA-1: 299240d78313ec92a53bdebae481d4c9f006d0ed SHA-256: 79f329f3a844ced71d25da27f6501cb4f732d999b93eaad3b419e6419ce63e92
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery. While no scripts were explicitly extracted, the PDF structure and numerous external URIs are indicative of malicious redirection.

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://fokemale.ru/strik?utm_term=python+convert+dict+keys+to+set PDF link annotation
    • https://jotovaxawunujej.weebly.com/uploads/1/3/1/8/131856347/dilisagifami.pdfIn PDF document text
    • https://migobagola.weebly.com/uploads/1/3/4/8/134874333/49d1a532dc5fa1.pdfIn PDF document text
    • https://wamogipoko.weebly.com/uploads/1/3/0/7/130739383/xibulawujerakazi.pdfIn PDF document text
    • http://wukuname.mypressonline.com/como_realizar_un_plan_de_marketing.pdfIn PDF document text
    • http://kavakedego.scienceontheweb.net/tovilizuvadewapezomax.pdfIn PDF document text
    • http://fukerijinexin.mygamesonline.org/b._arch_syllabus_jnafau.pdfIn PDF document text
    • https://fulitadu.weebly.com/uploads/1/3/4/8/134863398/4706860.pdfIn PDF document text
    • https://zufezoro.weebly.com/uploads/1/3/4/8/134885884/2720480.pdfIn PDF document text
    • https://rosajojuzexoked.weebly.com/uploads/1/3/0/8/130874599/7ee62.pdfIn PDF document text
    • http://cmb-societe.com/chefs_choice_diamond_hone_sharpener_110_instruction_bookletxjr5n.pdfIn PDF document text
    • http://gakagebir.mypressonline.com/govivizoj.pdfIn PDF document text
    • https://bepefuligifeval.weebly.com/uploads/1/3/5/9/135981888/xinipemur_tikeborew_zajejumurelil.pdfIn PDF document text
    • http://opticsystem.website/present_perfect_simple_exercises_with_answersh7evc.pdfIn PDF document text
    • https://majizozu.weebly.com/uploads/1/3/4/5/134598595/3130577.pdfIn PDF document text
    • http://resipowepo.getenjoyment.net/17040333135.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/rivazixexuguri/energia_biomassa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e68de8c-c39f-41d5-8ac6-90c1d31dbc06/what_intermolecular_forces_of_attraction_are_important_for_tertiary_structure.pdfIn PDF document text
    • https://s3.amazonaws.com/kufazete/nursery_rhymes_list.pdfIn PDF document text
    • https://s3.amazonaws.com/setaxilitozuko/22539396893.pdfIn PDF document text
    • https://s3.amazonaws.com/libosokune/34691619202.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b55e5bf-b1d7-41cc-be5a-a0165dd72e7b/individual_development_plan_goals_sample.pdfIn PDF document text
    • https://s3.amazonaws.com/xifabilejilab/how_to_set_up_coleman_tahiti_spa.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_off0000e9df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9DF 5012 bytes
SHA-256: e4f1cafc8d4f5adc2f1985cb281d3e5e4dff3a495c1528bf585ddcc583e82076
font_01_sfnt_off0000faf9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAF9 11280 bytes
SHA-256: 6908a250508669e9b054930cf061d1e52776b775df8b817c7f2aa8684a643311