Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c4b47cbb88e3da5…

MALICIOUS

PDF

81.5 KB Created: 2021-04-18 19:48:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: c66ff918fec04442ca95561e62ab5e45 SHA-1: 20ab64eed40ff500d72b427a4d6243d2b2482742 SHA-256: 9c4b47cbb88e3da522d580b9687f05cf9aaa1dc99ca560ea30116cb96b3627eb
126 Risk Score

Malware Insights

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

This PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable hosting, suggesting an attempt to redirect users to malicious sites. The document body, though heavily obfuscated, appears to be a lure related to computer peripherals, likely to trick users into clicking the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://lozipotod.ru/strik?utm_term=how+to+use+a+wireless+mouse+without+the+receiver PDF link annotation
    • https://takewozijofu.weebly.com/uploads/1/3/2/6/132682119/5613203.pdfIn PDF document text
    • http://xafawotilujos.mypressonline.com/que_son_los_organelos_celulares.pdfIn PDF document text
    • https://rulipowijipej.weebly.com/uploads/1/3/0/7/130775545/2992619.pdfIn PDF document text
    • https://rumefonurotu.weebly.com/uploads/1/3/0/7/130740232/tovekutufitu-birufiganazuje-wokanigire-diwuvupita.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416143/normal_6022bce5ba6f2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501980/normal_5fe6c505ce8a6.pdfIn PDF document text
    • http://pukebebizadolu.mypressonline.com/dan_brown_angels_and_demons_series_order.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410216/normal_5fc56bfea260f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486534/normal_60638ac5dce5a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416319/normal_60143f1226e07.pdfIn PDF document text
    • https://badosesidexezub.weebly.com/uploads/1/3/0/8/130874160/733f381.pdfIn PDF document text
    • http://dajobod.getenjoyment.net/english_grammar_book.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456676/normal_603f086f61273.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483349/normal_602592f5b8185.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fikirifulok.epizy.com/interview_questions_to_ask_candidates_about_culture.pdfIn PDF document text
    • http://widepidaba.atwebpages.com/82786255610.pdfIn PDF document text
    • http://xowobovu.myartsonline.com/how_to_turn_off_orbit_sprinkler_system.pdfIn PDF document text
    • https://s3.amazonaws.com/salade/kibegexoligefibut.pdfIn PDF document text
    • https://s3.amazonaws.com/nefunupu/18978270023.pdfIn PDF document text
    • https://s3.amazonaws.com/xarojapi/fagenegakaditupen.pdfIn PDF document text
    • http://wabalegawamiraj.rf.gd/genetics_from_genes_to_genomes_6th.pdfIn PDF document text
    • http://bupazutorudazeb.epizy.com/what_university_is_best_for_graphic_design.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_off000102ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102FF 5152 bytes
SHA-256: 32ef484038fdbd8a4ea37c6cd0b0ef083c8ddd29fe007f56160da2414225d7f4
font_01_sfnt_off0001146a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1146A 10572 bytes
SHA-256: a11d3c2d84bf22ffac5f5286e09a72c9bef842cef5d4b281b621420b37b86574

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