Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e6626a549aea132…

MALICIOUS

PDF

70.5 KB Created: 2021-03-03 07:08:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: d04fd0c7c73f00d673ffdd7935e14991 SHA-1: 1f98bbfb8f94792a73a8f5d0eb609bbce9075ca0 SHA-256: 7e6626a549aea132eb4b3c348674dd06a32aa18430536386dd60abb3bffdeb76
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains numerous embedded URLs, many pointing to disposable hosting or link farms, suggesting a phishing or malware distribution scheme. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically highlights the use of disposable hosting and link farming, reinforcing the malicious nature of the document's content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://leonvi.ru/award?keyword=representation+stuart+hall+2013+pdf PDF link annotation
    • https://nugaruxiboxora.weebly.com/uploads/1/3/0/7/130738781/b28f0fbe.pdfIn PDF document text
    • http://nitesufi.sportsontheweb.net/what_is_the_science_behind_fasting.pdfIn PDF document text
    • http://fresh-ita.fun/the_leftovers_season_2_trailer_song0z283.pdfIn PDF document text
    • https://pesiwuveso.weebly.com/uploads/1/3/5/3/135392822/xixovibovodi.pdfIn PDF document text
    • http://lianhua.life/war_of_the_worlds_british_empirex3p5t.pdfIn PDF document text
    • http://gratoraama.website/gospel_song_lyrics_with_guitar_chordsoo3q0.pdfIn PDF document text
    • http://tonedomopoja.scienceontheweb.net/jowagud.pdfIn PDF document text
    • http://vuvulusigi.scienceontheweb.net/call_keeps_stopping_alcatel.pdfIn PDF document text
    • http://bumumapa.mypressonline.com/fruity_loops_studio_mobile_tutorial.pdfIn PDF document text
    • http://gukiduwonaxinef.getenjoyment.net/wovulaxomureso.pdfIn PDF document text
    • http://rijexofugovu.medianewsonline.com/martin_lutero_las_95_tesis.pdfIn PDF document text
    • https://digagewopaloz.weebly.com/uploads/1/3/4/6/134634746/6010b58c701.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mubodadekutaxim.atwebpages.com/kaxoxejiximolumo.pdfIn PDF document text
    • https://s3.amazonaws.com/legenapi/77255954262.pdfIn PDF document text
    • https://s3.amazonaws.com/lopadivupudexa/28127956067.pdfIn PDF document text
    • https://s3.amazonaws.com/wulagisi/nursing_diagnosis_for_depression.pdfIn PDF document text
    • http://nununad.myartsonline.com/valoritobilib.pdfIn PDF document text
    • http://sasukagisodubex.onlinewebshop.net/how_to_change_time_on_samsung_idcs_18d.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_off0000d682.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD682 5628 bytes
SHA-256: 74d53b6e3cc70455b8fbf766c063887391c6a7b52e7cd2150d31f70b44c99be9
font_01_sfnt_off0000e9a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9A8 10304 bytes
SHA-256: 8637384bc0484baaaca91f9ea4d0067b48528b74dba30d3f03cf416ba611e344

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