Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fc14a71ce9b88aa…

MALICIOUS

PDF

79.9 KB Created: 2021-05-13 07:42:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 0b8e586a911172720d485805bf89e082 SHA-1: a49fa9ca2d3757aa1a5327dcb5d7ba7778a89012 SHA-256: 7fc14a71ce9b88aa68510eceb07b1d1a181c1629f66987f39214ff71a551534a
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The document body, though heavily obfuscated, appears to be a lure related to song lyrics, likely intended to trick users into clicking malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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/strik?utm_term=the+end+of+the+world+as+we+know+it+song+lyrics PDF link annotation
    • https://kamefumude.weebly.com/uploads/1/3/4/0/134018396/wibudufot.pdfIn PDF document text
    • https://cdn.sqhk.co/kazaluxi/cjeS6qQ/tunnel_rush_unblocked_games_77_weebly.pdfIn PDF document text
    • https://wanowozuvigamo.weebly.com/uploads/1/3/0/7/130738859/buwodowol.pdfIn PDF document text
    • https://rokolumer.weebly.com/uploads/1/3/0/9/130969153/8927511.pdfIn PDF document text
    • http://gokawojop.scienceontheweb.net/certificate_of_analysis_format.pdfIn PDF document text
    • http://bisibometixo.mywebcommunity.org/area_and_volume_of_different_shapes.pdfIn PDF document text
    • https://cdn.sqhk.co/zuronenom/Bhbgjkf/chicken_drumstick_recipe_oven_spicy.pdfIn PDF document text
    • https://sufifova.weebly.com/uploads/1/3/4/7/134736026/827cad9a.pdfIn PDF document text
    • https://cdn.sqhk.co/vujejanar/iJYrHha/monster_hunter_world_mods_ban.pdfIn PDF document text
    • https://cdn.sqhk.co/zegofurop/U4jiqQ0/onnect_pair_matching_puzzle_printable.pdfIn PDF document text
    • http://welitizenowem.mywebcommunity.org/vikutafezetuvikonunolop.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://a40b6db0-1679-4e03-879f-ac5827b9aa7d.filesusr.com/ugd/dba42a_46c053865b1d4b9c87ec45e0d9bc3a3e.pdf?index=trueIn PDF document text
    • https://a7176590-a44a-43b4-8b25-1171fb6190ac.filesusr.com/ugd/e6ccb8_18f20ec714754c7183915405b4d2676b.pdf?index=trueIn PDF document text
    • http://donijexufenu.onlinewebshop.net/mixed_past_and_present_tenses_exercises.pdfIn PDF document text
    • https://cccd2283-d272-450a-840b-6541230ebad2.filesusr.com/ugd/5de1df_6b463535598b49ec9b997902579a43f4.pdf?index=trueIn PDF document text
    • https://4590046d-f0a9-4171-b8a0-56ff8c1fe63c.filesusr.com/ugd/0bfb20_66784175d81949488474562777d356db.pdf?index=trueIn PDF document text
    • https://cf268418-7549-4780-9cff-e39e61b5276c.filesusr.com/ugd/0b1cf2_ff3d06384feb4834a5434017d9807ece.pdf?index=trueIn PDF document text
    • http://jitawidavez.atwebpages.com/30546248138.pdfIn PDF document text
    • https://d1159ab4-cbf5-42eb-897b-83a5e94cd7da.filesusr.com/ugd/536122_44e47e4f80bd48ec94a0a70055a7d65b.pdf?index=trueIn PDF document text
    • https://aaf2f8d8-4593-4070-95c3-ed2308805076.filesusr.com/ugd/337eea_e808e8acbb4f426f8d50ea78f51a0300.pdf?index=trueIn PDF document text
    • https://bad3f395-1638-4667-b349-d6f934eeab49.filesusr.com/ugd/ed2d23_9a093e77fa9a4f0aa06109b095a6c7d5.pdf?index=trueIn PDF document text
    • https://f3b8d348-8566-49c9-a9f8-a2c3b9e1bc8e.filesusr.com/ugd/f1c748_09b079fe29484e2cbf7739162bd11355.pdf?index=trueIn PDF document text
    • https://5ce19dfa-329f-495d-88d1-e1e7834d9072.filesusr.com/ugd/d902bb_9c0028503fd64271b3e497eaa9083779.pdf?index=trueIn 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_off0000f8fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8FC 5492 bytes
SHA-256: 85d1b124bb3c06df912075e84e259fd59714c36e4424d3b71311a71b39e7dadc
font_01_sfnt_off00010bbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BBF 10928 bytes
SHA-256: 8121ff2a4eb5ea1bc35e649d42d166bca049469d78450c25841c768dcffaaa47