Malicious PDF — malware analysis report

Static analysis result for SHA-256 becc0fb7c15ddea5…

MALICIOUS

PDF

76.6 KB Created: 2021-04-13 04:59:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 61505e24c4b6bfaec620fd981d9098fd SHA-1: 7bea348121337447e9decc5af7a7d5e8906298e9 SHA-256: becc0fb7c15ddea5225ebc92867062af2b5e378bdc1d9640ab4357baae9f8b30
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable domains and are likely part of a link farm designed to redirect users. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically phishing or malware distribution. The document body, though heavily obfuscated, contains a lure related to a Samsung TV, suggesting a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://ponafet.ru/strik?utm_term=samsung+55+inch+tv+tu7000 PDF link annotation
    • https://bamukozigo.weebly.com/uploads/1/3/1/4/131406799/pezuguli-rebilif.pdfIn PDF document text
    • http://shtangelkipokupkiitd.online/brian_froud_faeriesywgbn.pdfIn PDF document text
    • http://cardioactiveufficiale.site/c_17_cookbooknll2a.pdfIn PDF document text
    • http://dkblogin-de.best/ny_drivers_manual_spanish95b77.pdfIn PDF document text
    • http://katermore.ru/red_pyramid_graphic_noveln0985.pdfIn PDF document text
    • http://shishkin-seed.xyz/interior_design_case_studyf00wj.pdfIn PDF document text
    • http://mnogolidov.xyz/where_is_the_wps_button_on_tp_link_extenderpq9ij.pdfIn PDF document text
    • http://naturagrush.space/best_rock_n_roll_drum_solosaa0m4.pdfIn PDF document text
    • http://erogan-columbia.site/limits_algebraically_worksheetm8dk5.pdfIn PDF document text
    • http://zenizumalem.22web.org/light_on_life_bks_iyengar_download.pdfIn PDF document text
    • http://telemprom.xyz/garmin_78sc_manual97k14.pdfIn PDF document text
    • http://worldworkbook.com/69577070155jrzcg.pdfIn PDF document text
    • http://medyahanem.com/to_all_the_boys_ive_loved_beforeqho3j.pdfIn PDF document text
    • https://pusosisuko.weebly.com/uploads/1/3/6/0/136094517/1ac6e.pdfIn PDF document text
    • https://zokofefedepop.weebly.com/uploads/1/3/1/4/131437243/5153698.pdfIn PDF document text
    • http://on24-system.club/deutsch_adjektivdeklination_bungenz3o4m.pdfIn PDF document text
    • http://piredvizhnik.com/461711188990503s.pdfIn PDF document text
    • https://pejapuvurexoku.weebly.com/uploads/1/3/1/6/131636728/777d87da7fa1627.pdfIn PDF document text
    • http://nuvotana.22web.org/download_calculations_in_chemistry_textbook.pdfIn PDF document text
    • http://trenolgia.buzz/jugizufelotifebusebeduga6bgal.pdfIn PDF document text
    • http://homearfes.com/what_mags_fit_a_taurus_g2cqzw9e.pdfIn PDF document text
    • http://bionatur.space/element_tv_troubleshooting_no_media_devicekc5ib.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ribebipewafiwas.epizy.com/88948343761.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_off0000ebd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBD5 5596 bytes
SHA-256: cc383d5ef76c32ca349958143774058b4e97e1986e621516a6cc9e017bec7e0a
font_01_sfnt_off0000fecf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFECF 11312 bytes
SHA-256: 89e34006237113ec4c1dcb976dedea042bb1c1d58396ca17c8efbb88123556c5

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