Malicious PDF — malware analysis report

Static analysis result for SHA-256 14bdff96db315c43…

MALICIOUS

PDF

74.3 KB Created: 2021-03-03 06:44:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 1c32820bd439fb7c62d688df5df40e14 SHA-1: 27578db9d8d65a96ec9affb71735a86acbf2dc1a SHA-256: 14bdff96db315c438d02d35f9dfb86b183a7b84967093cc6122a50b052fa3643
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://baarspo.ru/strik?utm_term=stack+on+16+gun+tactical+cabinet+for+sale PDF link annotation
    • https://nagejezesalu.weebly.com/uploads/1/3/0/8/130874580/jikufuxefepuvufuf.pdfIn PDF document text
    • https://cdn.sqhk.co/zosiwikiw/Zpihhbf/55616665567.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409000/normal_5fc76322e9a01.pdfIn PDF document text
    • https://dofemavuxowag.weebly.com/uploads/1/3/0/7/130739836/jitimulapopirigazo.pdfIn PDF document text
    • https://zarimuxeve.weebly.com/uploads/1/3/4/8/134897304/9766361.pdfIn PDF document text
    • https://kovekigesig.weebly.com/uploads/1/3/1/1/131164481/10c408.pdfIn PDF document text
    • https://cdn.sqhk.co/posogamumut/ihef3RN/76458213900.pdfIn PDF document text
    • https://cdn.sqhk.co/pivoledofag/heGGNlT/motd_podcast_goals.pdfIn PDF document text
    • https://cdn.sqhk.co/fafojipedul/avvibgj/the_last_wizard_of_the_century_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470016/normal_603b03dddf82a.pdfIn PDF document text
    • http://kedugobepuged.mywebcommunity.org/should_uniforms_be_compulsory_in_schools_essay.pdfIn PDF document text
    • https://satizivuzaked.weebly.com/uploads/1/3/4/3/134383512/joselobawoguradafixe.pdfIn PDF document text
    • https://cdn.sqhk.co/sononipo/Mje08QP/car_racing_3d_game_for_java.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370547/normal_5feea65d8578e.pdfIn PDF document text
    • https://cdn.sqhk.co/sowodopevew/Niampue/konanegovujonagireseja.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450898/normal_5ffdd69083bf0.pdfIn PDF document text
    • https://fubareno.weebly.com/uploads/1/3/1/4/131482864/a6d904f10148d55.pdfIn PDF document text
    • https://cdn.sqhk.co/dugixikisim/fvhfjig/36473136588.pdfIn PDF document text
    • http://watogoda.mypressonline.com/how_to_upload_html_verification_file_to_wix_website.pdfIn PDF document text
    • https://furedanoduribi.weebly.com/uploads/1/3/4/6/134681858/d62028465d.pdfIn PDF document text
    • https://radugimexeb.weebly.com/uploads/1/3/4/8/134880062/2749330.pdfIn PDF document text
    • https://cdn.sqhk.co/zarejesorufo/cAcjcji/youtube_vr_oculus_quest_not_working.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389104/normal_5fed3bc8c2ce2.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
    • http://zipemoluligera.myartsonline.com/migagamom.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_off0000d780.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD780 5444 bytes
SHA-256: bed4757fa1204f0ed14d6da6d4945eccaf57fd54ba3b9e8e5d64415f266f4370
font_01_sfnt_off0000ea0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA0B 10316 bytes
SHA-256: ac8588f1c187a59ef7b4ad8762bdd81f656ba51ed1c5345d91994876b1fcfda2
font_02_sfnt_off00010d72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D72 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71