Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e196e9de531139f…

MALICIOUS

PDF

88.7 KB Created: 2021-03-07 04:40:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 06ddc7ca356f6097891af2c3e71f4cb8 SHA-1: cd7739f1d4e3bdd7957eb0ba58ceb6abd725f253 SHA-256: 2e196e9de531139f0ece0902f68f52fe8a4910d4ca7203201d82db3784bc2b53
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a critical heuristic flagging it as malicious and likely phishing-related. The ML classifier also strongly indicated maliciousness. The primary malicious URL identified is https://ponafet.ru/strik, which is likely used to redirect the user to a phishing or malware-hosting site. No scripts were extracted, but the PDF structure itself is indicative of a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://ponafet.ru/strik?utm_term=how+can+i+be+more+self+disciplined PDF link annotation
    • https://mavezuwunokil.weebly.com/uploads/1/3/4/6/134627141/tigasisusesiwovunek.pdfIn PDF document text
    • http://fulusixavopowem.iblogger.org/83046137058.pdfIn PDF document text
    • https://petirinupupa.weebly.com/uploads/1/3/1/4/131438611/154bc8f70.pdfIn PDF document text
    • https://cdn.sqhk.co/rogenujudita/fgdFqjg/slifer_the_sky_dragon_gbi-_001_fake.pdfIn PDF document text
    • https://fotavimapuwe.weebly.com/uploads/1/3/2/8/132816041/setiwaw-dizitekekakeg-lisafufomolulem.pdfIn PDF document text
    • https://cdn.sqhk.co/roretuduva/hjgdaux/goat_sim_waste_of_space_all_trophies.pdfIn PDF document text
    • http://bobakolanuvam.22web.org/republic_of_doyle_season_4_episode_5_cast.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/98a1146d-ce18-477c-8772-88fca3e3f87c/free_birthday_meals_appleton_wi.pdfIn PDF document text
    • https://s3.amazonaws.com/tesapibebujep/vivosabojuji.pdfIn PDF document text
    • http://gesovupa.epizy.com/safunajes.pdfIn PDF document text
    • http://doborokozudu.epizy.com/sherlock_holmes_the_sign_of_four_chapter_3_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8da97b62-eb56-478c-8200-b56d2cd4e2e5/hillsborough_county_public_schools_holidays_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/minaxigevani/wrong_turn_5_sinhala_subtitles.pdfIn PDF document text
    • http://walexesanub.rf.gd/how_to_replace_bearing_in_frigidaire_front_load_washer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9feb1ef5-4de8-4c01-9ec1-fab49b4d1ddf/49595205195.pdfIn PDF document text
    • http://ramufezumax.rf.gd/wuxirititurojuzokoj.pdfIn PDF document text
    • http://lomurobutu.epizy.com/crystal_reports_edit_command.pdfIn PDF document text
    • http://teredibake.rf.gd/ralujeroduva.pdfIn PDF document text
    • https://s3.amazonaws.com/zugutixe/fexabajorowokozopedizub.pdfIn PDF document text
    • http://pusevim.epizy.com/neonatal_bartter_syndrome.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2f1ab42-e451-487b-b12a-cd81a72abef6/what_are_opinion_signal_words.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000110e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110E2 5204 bytes
SHA-256: 57628bebc43849ea35b04b23b75cdc0c818ea5718d88e81ee070d67cdfa91f4f
font_01_sfnt_off0001226f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1226F 10680 bytes
SHA-256: 80f9623a0ea62b073d0c5f452a632b595a77e0e650d6b533ffccff35bf4b7730
font_02_sfnt_off000146f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x146F6 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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