Malicious PDF — malware analysis report

Static analysis result for SHA-256 57ce0317b076996b…

MALICIOUS

PDF

73.0 KB Created: 2021-03-19 23:34:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 2f8afe5f93aceb3edec782be321aea94 SHA-1: 492d0a4308011691d7755c515c247a98a6b46b36 SHA-256: 57ce0317b076996b14de58f6f588a3e787567fa1ad555cfa59313ff2654e95c0
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one prominently featuring a "meme bill and ted" theme and pointing to a suspicious domain. Heuristics indicate this PDF is part of a link farm on disposable hosting, and ClamAV detection confirms it as a phishing trojan. The presence of external URIs suggests an attempt to redirect the user to a malicious site for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=meme+bill+and+ted PDF link annotation
    • http://domobifotuza.sportsontheweb.net/how_to_adjust_carburetor_on_troy_bilt_tiller.pdfIn PDF document text
    • http://semowatuk.iblogger.org/baal_veer_wala_game.pdfIn PDF document text
    • http://tiwujatujoput.mygamesonline.org/spelling_practice_activities.pdfIn PDF document text
    • http://kofojoxake.mygamesonline.org/what_is_the_symbol_for_wind_on_the_weather_channel.pdfIn PDF document text
    • http://peteferix.mypressonline.com/habits_of_mind_chart.pdfIn PDF document text
    • https://cdn.sqhk.co/xuxinugad/crsOqPM/flix_movie_schedule.pdfIn PDF document text
    • https://cdn.sqhk.co/xibexowufifu/mkZgjV1/cosco_shipping_holdings_annual_report_2018.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/kuxegu/pokesopepatedufak.pdfIn PDF document text
    • http://sesufutix.rf.gd/46159319744.pdfIn PDF document text
    • http://feferabi.atwebpages.com/pdf_adobe_acrobat_reader_8_free_download.pdfIn PDF document text
    • http://duwenifigeni.rf.gd/all_awards_and_honours_2018.pdfIn PDF document text
    • http://fukokisofor.epizy.com/beats_studio_3_wireless_over-ear_headphones_matte_black.pdfIn PDF document text
    • http://kukejisagev.epizy.com/fudofifobukota.pdfIn PDF document text
    • https://s3.amazonaws.com/rorives/zajujiwetoka.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3cc9046d-b949-4b67-856e-05556109c9f6/pokapedatir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f56959eb-199a-46f4-989c-ad7237e42bff/91471383270.pdfIn PDF document text
    • https://s3.amazonaws.com/dikomavomem/hills_pet_nutrition_jobs_australia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd1fcad7-1cd1-43dc-815f-a5eba082bf94/91212750998.pdfIn PDF document text
    • https://s3.amazonaws.com/numunenoji/23863112317.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_off0000e34a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE34A 4840 bytes
SHA-256: 017d8f7f5d2d5bc7367f45842ce253cd593dbf75010f1d1a0434497dddc56d02
font_01_sfnt_off0000f3b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3B6 10516 bytes
SHA-256: d7cb228a88a88dd27f8735f2b04efee3c547850538a062d6d0a9f1db214d57d6

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