Malicious PDF — malware analysis report

Static analysis result for SHA-256 eaf277ba12d68c2e…

MALICIOUS

PDF

75.5 KB Created: 2021-04-09 04:37:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 1db82bb048442d64a9d47b7d5edaf269 SHA-1: 671c6fe9929c475b6099eec5aebb533d9a8acfbc SHA-256: eaf277ba12d68c2ee2095f4ca09633b703d8209a44af3bc98006e2dd1292ba72
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many pointing to disposable domains, indicative of a link farm or phishing campaign. Heuristics indicate a high likelihood of malicious content, with ClamAV specifically identifying it as Pdf.Phishing.Trojan. The embedded URLs and the nature of the heuristics strongly suggest this document is designed to redirect users to malicious sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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=cuantos+tipos+de+sistemas+termodinamicos+hay PDF link annotation
    • http://tomesopinobiz.iblogger.org/katebofu.pdfIn PDF document text
    • https://cdn.sqhk.co/pimibopugugo/gea8e4z/how_to_play_mini_games_on_minecraft_ipad.pdfIn PDF document text
    • https://cdn.sqhk.co/dajuzafum/g4TiiFG/92225298271.pdfIn PDF document text
    • https://cdn.sqhk.co/dodamewope/aNifhbz/10200811726.pdfIn PDF document text
    • http://monongzhlh.space/evil_officer_horror_house_escapezx6be.pdfIn PDF document text
    • http://sapinatuligoro.22web.org/rikobejivusororife.pdfIn PDF document text
    • https://wonulabanasilod.weebly.com/uploads/1/3/1/4/131482851/xepadoxolulimis-wevebepexifozi.pdfIn PDF document text
    • https://cdn.sqhk.co/lekifuwixal/giifib7/funulivopesorafa.pdfIn PDF document text
    • https://cdn.sqhk.co/leredupodeka/ijn3Ojb/46024289276.pdfIn PDF document text
    • http://vereffka.xyz/how_to_clean_drain_pump_on_samsung_front_load_washer4u7fb.pdfIn PDF document text
    • http://helpcopyright-service.com/dale_vida_a_tu_cerebro7ois7.pdfIn PDF document text
    • https://cdn.sqhk.co/salosegebomi/b6jcjdV/8093869393.pdfIn PDF document text
    • https://wuwenesugujiku.weebly.com/uploads/1/3/0/7/130739695/6332425.pdfIn PDF document text
    • https://cdn.sqhk.co/kivipemo/Coljfza/20686375296.pdfIn PDF document text
    • https://cdn.sqhk.co/zimalodepafo/dTdhjy7/racing_motorcycles_for_sale_ebay.pdfIn PDF document text
    • https://cdn.sqhk.co/jevamivuvugi/Rihwqhj/reflex_test_knee_fail.pdfIn PDF document text
    • https://xuvifadeto.weebly.com/uploads/1/3/2/6/132682806/zeguxoke.pdfIn PDF document text
    • http://dk-inc.xyz/el_ser_y_la_nada_19439vyic.pdfIn PDF document text
    • https://cdn.sqhk.co/bugininaxi/gdZha6b/vistaprint_vinyl_banner_template.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/libeganot/estudio_de_prefactibilidad.pdfIn PDF document text
    • http://menaronutex.epizy.com/color_code_personality_test.pdfIn PDF document text
    • http://bejelopelavisi.epizy.com/72932071443.pdfIn PDF document text
    • https://s3.amazonaws.com/xukonakefules/jigik.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_off0000e90a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE90A 5288 bytes
SHA-256: 36ca6fb4d2d417cf281dddf1dcc9b4dfce5d213e46e09bb2ca1e7328d34d8996
font_01_sfnt_off0000fadc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFADC 11064 bytes
SHA-256: aceb3c214959d385b47d569d35f48236f6dba9aca17eba41b745032ea7ebba3b