Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4805622039cc23d…

MALICIOUS

PDF

70.9 KB Created: 2021-03-07 01:18:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: 508835d85c0d99cf9f7cd8eddd36b148 SHA-1: 2a8739b8cdc9ec5b9fe87130a4737b291f34164b SHA-256: e4805622039cc23dcca4c2322dfdc1345e0b3480c5288bf5146043d8c91321f6
126 Risk Score

Malware Insights

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

The PDF contains numerous external URIs, many pointing to disposable domains, indicating a link farm or redirection mechanism. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://baarspo.ru/wix?keyword=words+often+confused+worksheet+answers PDF link annotation
    • http://fajiriduxir.medianewsonline.com/dobebirin.pdfIn PDF document text
    • http://0fruit.space/balak_palak_marathi_full_movie_free2302z.pdfIn PDF document text
    • http://digovin.getenjoyment.net/rolokowaxumogusez.pdfIn PDF document text
    • http://lizuzezusad.medianewsonline.com/18130756520.pdfIn PDF document text
    • http://roxedizusugu.mywebcommunity.org/62160444856.pdfIn PDF document text
    • http://lebuvowune.getenjoyment.net/jositomibari.pdfIn PDF document text
    • http://sevoxotedeki.medianewsonline.com/canon_vixia_hf_r800_battery.pdfIn PDF document text
    • http://teksalon.xyz/jevopesejeladirxj9uq.pdfIn PDF document text
    • http://study-english-04.space/chhote_raja_song_pagalworldc8oab.pdfIn PDF document text
    • http://chambreapp.xyz/zukegepuxagezadaa3hs1.pdfIn PDF document text
    • http://lowwsaw.xyz/dujadidafesujinqnerj.pdfIn PDF document text
    • http://kuvezowepo.scienceontheweb.net/what_event_marked_the_end_of_the_radical_phase_of_the_french_revolution.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://magomigubilo.rf.gd/how_to_remove_kenmore_glass_stove_top.pdfIn PDF document text
    • https://s3.amazonaws.com/sugowubuf/55254767309.pdfIn PDF document text
    • http://fibubaxuvuvixik.epizy.com/b_q_large_dust_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/zukogi/christina_perri_human_audio_song.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4b498bb-7945-4a56-ba84-c1ec4ca47c0b/tividenavepama.pdfIn PDF document text
    • http://nejimafalun.onlinewebshop.net/12412893198.pdfIn PDF document text
    • http://jojisoxig.epizy.com/literature_review_internship_report.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e93458f4-a84a-469f-8669-f7f3840276c5/how_to_replace_brother_fuser_unit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/641b00d5-59a1-46be-8407-a4a62acfed22/63912708708.pdfIn PDF document text
    • https://s3.amazonaws.com/muwomapotumugi/poxagawabimopare.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_off0000d91e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD91E 5244 bytes
SHA-256: 83432c235f2245de35e11b9a81590db63d310c50bfa566cdd8284b27d6d70042
font_01_sfnt_off0000eb0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB0D 10304 bytes
SHA-256: 070744c8f1264bac78458c8a1adeefcbef3dc69014c12d42e3f4875337768213

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