Malicious PDF — malware analysis report

Static analysis result for SHA-256 a805870767f30054…

MALICIOUS

PDF

72.4 KB Created: 2021-03-11 02:44:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 4e8852a0aff6f5599db7853c2a5cce5d SHA-1: 0178225e58a1f83aedf9f771fcdcda1e00cf67ed SHA-256: a805870767f30054c8ca8e30d03ca6a812c02e649c7083dcb1c6332d9c658832
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious content. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. The embedded URLs and the document's structure point towards a phishing or malware distribution attempt, likely initiated via spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://ponafet.ru/123?utm_term=little+alchemy+guide+wood PDF link annotation
    • https://ruxibotululag.weebly.com/uploads/1/3/1/4/131408142/5885611.pdfIn PDF document text
    • https://bisigategisabuv.weebly.com/uploads/1/3/4/8/134884720/afaebbf47d396.pdfIn PDF document text
    • https://sakurulemiba.weebly.com/uploads/1/3/0/9/130969926/4473367.pdfIn PDF document text
    • http://betijeduw.getenjoyment.net/massey_ferguson_parts_list.pdfIn PDF document text
    • https://tepewumulu.weebly.com/uploads/1/3/1/3/131384412/kefikezalobej.pdfIn PDF document text
    • http://gagivukamuw.getenjoyment.net/60535838175.pdfIn PDF document text
    • http://guwelureg.22web.org/samsung_galaxy_note_10.1_charger_cable.pdfIn PDF document text
    • https://jamolirotiwe.weebly.com/uploads/1/3/4/6/134693152/jerefusogub-wowawosubev-dodokag-xulazamewiwed.pdfIn PDF document text
    • http://detozube.scienceontheweb.net/44907548987.pdfIn PDF document text
    • http://jivusibofonefud.mygamesonline.org/how_to_take_the_front_cover_off_a_whirlpool_duet_washer.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rosevasejila.myartsonline.com/gathering_storm_civ_6_new_leaders.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67ae40b6-8237-4f19-a35f-5c244a55a91e/tcnicas_de_redaccin_estilo_coherencia_y_concordancia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02e63e76-bdee-4db5-abde-26d7643605fa/89883588719.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9560e5fc-11c2-4e1e-a0ae-e022b163d031/12486796441.pdfIn PDF document text
    • http://roruvavaderej.epizy.com/74487370265.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bebb6933-9cbd-41dd-9be2-bad6eb45edf2/xakogufebamitufefoje.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b07336e7-a58b-4732-bf37-d8e4349cc5b0/protocol_predator_rc_helicopter_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34147b57-c452-4e48-b83d-c76228fb6ea1/windows_7_sleep_command_not_working.pdfIn PDF document text
    • http://mimonutemabase.epizy.com/will_the_year_2020_be_in_history_books.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bcf95413-5612-4d51-87be-a57766a3f26a/gujenifiderusejotebosa.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_off0000df84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF84 5212 bytes
SHA-256: c85261ca8fc4771e52a311086980b8a4af0bfa95642f68e16733da631f730069
font_01_sfnt_off0000f130.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF130 10192 bytes
SHA-256: bced3065c9dba492343bd01dc5576e918bc4bde40148298a11e78ad2667b0fe4