Malicious PDF — malware analysis report

Static analysis result for SHA-256 0da35e17bbca3dae…

MALICIOUS

PDF

64.1 KB Created: 2021-01-22 15:46:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 7f23515ba427820779b8d03ca961008a SHA-1: 3f6772ce935d49e72e1ef445b09c04794685bac1 SHA-256: 0da35e17bbca3dae3de20bcd17f65dc6e2926fc6af6c0b10edb78cbac20f8a0a
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/wb?keyword=diy%20ideas%20for%20old%20drawers In PDF document text
    • https://vixikubinimagap.weebly.com/uploads/1/3/3/9/133997110/losimixugak_wokukumak_jobasok.pdfIn PDF document text
    • https://cdn.sqhk.co/derepinejabi/CVhahdq/the_voting_information_center.pdfIn PDF document text
    • https://cdn.sqhk.co/pesenexur/ebLOczZ/42863070814.pdfIn PDF document text
    • https://site-1176572.mozfiles.com/files/1176572/hot_spring_story_apk_full_version.pdfIn PDF document text
    • https://foraketarikovef.weebly.com/uploads/1/3/4/6/134608655/rodelo.pdfIn PDF document text
    • https://cdn.sqhk.co/lafuwexale/ihjXbDb/57136224767.pdfIn PDF document text
    • https://site-1177860.mozfiles.com/files/1177860/91153602259.pdfIn PDF document text
    • https://site-1211946.mozfiles.com/files/1211946/weather_report_brentwood_ca.pdfIn PDF document text
    • https://site-1237964.mozfiles.com/files/1237964/lamokujomadadusonak.pdfIn PDF document text
    • https://site-1175852.mozfiles.com/files/1175852/battle_city_tank_online_2_player.pdfIn PDF document text
    • https://cdn.sqhk.co/jafetegupam/ijEShbG/damikumonasevejofebut.pdfIn PDF document text
    • https://cdn.sqhk.co/keviwebewuta/ocgjHja/30279444499.pdfIn PDF document text
    • https://mabaxezo.weebly.com/uploads/1/3/4/7/134766945/8855526.pdfIn PDF document text
    • https://werotibumef.weebly.com/uploads/1/3/4/9/134900185/vetofevibolu_xitebukobudok_lemukunigemo_koxen.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/vavejijitatofu/rusomodofisetoxexipogoj.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_off0000bdb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBDB9 5096 bytes
SHA-256: 69fbcec6b2a7566bbc23af772e3909a6b9fc6436f68d2374ba5e4157cebe0367
font_01_sfnt_off0000cf39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF39 10688 bytes
SHA-256: 909d651ac85b7fe8b366baad57d27e2686fe645ca162f1649a437d99a4345ab1