Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae450a6a06a8ccde…

MALICIOUS

PDF

80.4 KB Created: 2021-03-03 20:40:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: f43c4abb74fd02c6d0f0fe12ffe7b3f8 SHA-1: 286e195f7940928a6d007f29bf9e610f66448bea SHA-256: ae450a6a06a8ccde05f326ba09855b3878eaf6a2241f5d6fcf90db07f0b510d5
186 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by both ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains a significant number of external links, suggesting it functions as a link farm designed to redirect users to potentially harmful websites. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic further support this, pointing towards a phishing or SEO-scamming operation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://bologen.ru/strik?utm_term=washington+dc+weather+forecast+january+6+2021 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4402488/normal_5fd782e6cc1a0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426699/normal_6011da850c7fc.pdfIn PDF document text
    • https://cdn.sqhk.co/kitujesijak/hHsyEIS/logo_quiz_answers_level_30.pdfIn PDF document text
    • http://zavodtriumf.com/tizagolazitega23whh.pdfIn PDF document text
    • https://xikaxuroloxo.weebly.com/uploads/1/3/1/4/131406092/3048848.pdfIn PDF document text
    • https://cdn.sqhk.co/mevazasid/lhjcHig/minecraft_earth_release_date_europe.pdfIn PDF document text
    • https://cdn.sqhk.co/gazamara/ksghZhf/linkmenu_ezerai_3_etapas.pdfIn PDF document text
    • https://cdn.sqhk.co/bavimimo/Fjijjcv/91057570405.pdfIn PDF document text
    • https://vevofuxideg.weebly.com/uploads/1/3/1/4/131405958/noxonefigawir-dufurowobix-lumopil.pdfIn PDF document text
    • https://popetufuwude.weebly.com/uploads/1/3/1/4/131483025/pinozewuseg-veretigebiwetep-wigewuwiwevo.pdfIn PDF document text
    • https://cdn.sqhk.co/fofateze/haXggDL/tetris_effect_metamorphosis_dynamic_theme_music.pdfIn PDF document text
    • https://jonimewogil.weebly.com/uploads/1/3/1/8/131860125/8341699.pdfIn PDF document text
    • https://cdn.sqhk.co/jozazixefuf/hhggiaz/kurevebemagafunizav.pdfIn PDF document text
    • https://cdn.sqhk.co/nedabuke/OgP80ji/pojapodesune.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/lebaxa/62972565165.pdfIn PDF document text
    • https://s3.amazonaws.com/bulikowexunepov/45018855095.pdfIn PDF document text
    • https://s3.amazonaws.com/xapijifas/87979350530.pdfIn PDF document text
    • https://s3.amazonaws.com/wiwamoxamo/free_math_worksheets_fractions_8th_grade.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_off0000f95d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF95D 6012 bytes
SHA-256: baab32fa9c1d80a6bdb9def5299583a3197abdaf1900d2eed19f9ad8d6509c3d
font_01_sfnt_off00010dfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DFD 11264 bytes
SHA-256: 1c8f64b42d717d4f606f0a3529f8e94256d53a01f9fae5b4e329f218b8232087

Open this report in the interactive analyzer, or submit your own file for analysis.