Malicious PDF — malware analysis report

Static analysis result for SHA-256 802c08b1d9d79ef2…

MALICIOUS

PDF

79.1 KB Created: 2021-03-27 20:25:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 0511655c09de377dfa793cf515594eac SHA-1: 7e0de5c636fa99e49865ba9e5a2800e0569ac13a SHA-256: 802c08b1d9d79ef2f39afe16b19add80d849d51dfee4e87fc7d861f53217d0e3
186 Risk Score

Malware Insights

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

This PDF file exhibits characteristics of a phishing lure, presenting itself as a resource for 'shell scripting video tutorial free download' to entice users to click on embedded links. The heuristic firings indicate a link farm structure, with numerous external URLs, many hosted on disposable domains, suggesting an attempt to redirect users to potentially malicious content. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature.

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://vilenefex.ru/strik?utm_term=shell+scripting+video+tutorial+free+download PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4468554/normal_5ff60fc2dd704.pdfIn PDF document text
    • http://creditreportfast.info/how_to_use_thinkorswim_scanner0x8yz.pdfIn PDF document text
    • https://zatitobeme.weebly.com/uploads/1/3/4/0/134097178/a7aaa3659b6.pdfIn PDF document text
    • http://tvoeobrazovanie.fun/mujosivikoxumebomumomevagav3vx.pdfIn PDF document text
    • http://health-top.ru/66088240870zpun1.pdfIn PDF document text
    • https://vanuludegevu.weebly.com/uploads/1/3/0/7/130776818/buzafogav-femafajojid-torovisige-vofejuxos.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374379/normal_601802d82fabf.pdfIn PDF document text
    • http://zumbayuliya.online/xububusabefokagesuginaq4mrx.pdfIn PDF document text
    • https://paxuxitusokewu.weebly.com/uploads/1/3/1/3/131380341/tojepijeno.pdfIn PDF document text
    • http://zabovawupe.mypressonline.com/biologi_sma_kelas_xii_kurikulum_2020.pdfIn PDF document text
    • http://lobabinuladeri.medianewsonline.com/how_many_calories_are_in_a_dunkin_donuts_coffee_roll.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447086/normal_605f39ec584bf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459917/normal_605f746dc6cd3.pdfIn PDF document text
    • http://dimozakebaba.scienceontheweb.net/lancets_for_contour_next_ez.pdfIn PDF document text
    • http://servempieza.site/jfet_biasingw3c50.pdfIn PDF document text
    • http://galufixagomedo.getenjoyment.net/faringitis_kronik_adalah.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://c78ffd2e-fc3d-4272-86ca-968d835fb7ad.filesusr.com/ugd/0f9ef0_e45727b5cf9d4bf186d13b042066df96.pdf?index=trueIn PDF document text
    • https://be9c8297-50e9-4ec8-be22-7cc4068ef96a.filesusr.com/ugd/fc3b0b_c435b8a87fcf4e478cb99f9c116baba3.pdf?index=trueIn PDF document text
    • https://e301b21f-f707-426c-a094-6199d4b1a2d6.filesusr.com/ugd/f65518_837fe0e841a7460485e9a4f3028c3233.pdf?index=trueIn PDF document text
    • https://b5526579-b22d-45a0-8251-9885a72cf3eb.filesusr.com/ugd/0cd019_fbd57a805487420698624a52ea68893f.pdf?index=trueIn PDF document text
    • http://pulutugorivexek.atwebpages.com/siruvopakupevogofifitopi.pdfIn PDF document text
    • https://d4508431-0eee-4913-ac2a-2ec907ed9b18.filesusr.com/ugd/12daa7_e17d935559a7499087ef8ff8631f9918.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_off0000f719.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF719 5672 bytes
SHA-256: 9073a431c4c80d984184b757692cbe6380e6a0eaf8a1e2c979a46c1b887195be
font_01_sfnt_off00010a7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A7E 10772 bytes
SHA-256: b89295125c356312f9d6e51d0b9ef5e81d13a9c95b0b4b019ff1deb886f79132