Malicious PDF — malware analysis report

Static analysis result for SHA-256 792c567e256ec1d4…

MALICIOUS

PDF

88.9 KB Created: 2021-04-26 19:59:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: a952a2cca521c08814e2384d5a0f55f6 SHA-1: b1f2f4deaa78e847cbb47faa2f10ca13f9115124 SHA-256: 792c567e256ec1d43b3ffb836e1fe49347ee5bc57e09cc8650d3e9d71cfa63a3
186 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm designed to redirect users to potentially malicious content. The document body, though heavily obfuscated, appears to be a lure related to a search query, further supporting a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://jacksth.ru/strik?utm_term=elementary+quantum+mechanics+in+chemistry+pdf PDF link annotation
    • http://podorokufexapal.iblogger.org/11382852131.pdfIn PDF document text
    • https://cdn.sqhk.co/difanemifal/KWuVMic/bollywood_ringtone_2020_download_mp3_pagalworld.pdfIn PDF document text
    • https://cdn.sqhk.co/donaxewon/haghphi/shares_in_bearer_form_definition.pdfIn PDF document text
    • http://kelimap.mywebcommunity.org/amoeba_sisters_alleles_and_genes_answer_key.pdfIn PDF document text
    • https://cdn.sqhk.co/zoluxoni/6fjfCjc/telegram_application_2020.pdfIn PDF document text
    • http://liwitesuzemumex.sportsontheweb.net/99300312630.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://121f8fc1-d270-4171-a721-8ccd656fc20f.filesusr.com/ugd/2ca22b_d49147bdb70349ac9afce95ce563cc96.pdf?index=trueIn PDF document text
    • https://36071b1a-d853-4ad1-bccf-0ed894d94038.filesusr.com/ugd/906e9f_4f8d3ce06c514b35bd2bb9de28d7727b.pdf?index=trueIn PDF document text
    • https://8e12fe21-47c1-448c-af9e-883e7c84523b.filesusr.com/ugd/52ac5e_590ba5be64cc49148e4f29b6c1657167.pdf?index=trueIn PDF document text
    • http://makakanow.onlinewebshop.net/3979686900.pdfIn PDF document text
    • http://nosigegu.onlinewebshop.net/47023763675.pdfIn PDF document text
    • https://8f6f9f04-f977-4239-955d-f6aecf2dd879.filesusr.com/ugd/81cd61_28fac06f7b77425db29159925b312fe0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fakuguvil/manifesto_barisan_nasional_pru_14.pdfIn PDF document text
    • http://defurujaligat.epizy.com/dewatamurexolajaxaw.pdfIn PDF document text
    • https://s3.amazonaws.com/nufidibodudulad/rite_aid_blood_pressure_monitor_wrist.pdfIn PDF document text
    • http://lazubag.epizy.com/500_greatest_songs_of_all_time_wiki.pdfIn PDF document text
    • https://db6d3479-2aeb-4a59-914c-1f55c48648c8.filesusr.com/ugd/9f5433_371924d7907048b88f7d2adc17c936c9.pdf?index=trueIn PDF document text
    • http://lojabupabavize.onlinewebshop.net/88920511136.pdfIn PDF document text
    • https://0f0532cb-4478-41f9-91a1-cf277c4732ec.filesusr.com/ugd/8acad3_2ab051f68b394e87bf5a6bff352bb8d7.pdf?index=trueIn PDF document text
    • https://aca292c6-a3ee-4c96-b4c9-db15c8eca1b9.filesusr.com/ugd/cd1d52_20ec04d3293e467a9f47fe871b366321.pdf?index=trueIn PDF document text
    • http://jopumogezev.epizy.com/jemomanagezadosoduti.pdfIn PDF document text
    • https://87b84290-c0b3-4c73-97a1-3d59c64c3f69.filesusr.com/ugd/c638b7_59949828e5c043b49678483ab2bb5cb1.pdf?index=trueIn PDF document text
    • https://6ce95562-7558-49ee-a7b0-b3003db3b0e9.filesusr.com/ugd/d13e1f_f27f019db46f4b6e8a2402e0712b4fa5.pdf?index=trueIn 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010049.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10049 5580 bytes
SHA-256: 4d2a20a2dff0c983e83a4c67c7f92420c034742d99c13bccb0eb7a2b32978139
font_01_sfnt_off00011321.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11321 13244 bytes
SHA-256: abc6c4b00cd509fd955cc6a40395348a57d2638aa87885b9b33d515a87e04ad3
font_02_sfnt_off00013ff9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FF9 16232 bytes
SHA-256: 0e3a76ebc99020072ed2dac266a1ea68e794318d1f502509dfccf0cfbd1ff31e

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