Malicious PDF — malware analysis report

Static analysis result for SHA-256 bded718d029b101f…

MALICIOUS

PDF

79.9 KB Created: 2021-03-17 19:17:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 99dede377896c9690f318a84a1b99421 SHA-1: c1976afdfd937d2dc3d99efa7712127929c2e717 SHA-256: bded718d029b101fdfa4bab850d4188b94106625f56d9fd725de5e4369dc5c51
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to disposable hosting and employing SEO-like keywords, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to potentially harmful websites, possibly for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://xezojetit.ru/award?keyword=biological+classification+book+pdf PDF link annotation
    • https://bematurom.weebly.com/uploads/1/3/4/8/134886193/7228012.pdfIn PDF document text
    • http://losinglotterynumbers.com/types_of_switchgearzddhl.pdfIn PDF document text
    • https://febasenijig.weebly.com/uploads/1/3/1/3/131379808/vomowodomujetej.pdfIn PDF document text
    • https://jadusulad.weebly.com/uploads/1/3/4/7/134764450/vijojazi_dosadomakavimel.pdfIn PDF document text
    • https://gamepasak.weebly.com/uploads/1/3/4/1/134109087/mejofadodolos.pdfIn PDF document text
    • https://cdn.sqhk.co/letijefa/X2hjib9/75645865553.pdfIn PDF document text
    • https://cdn.sqhk.co/sesexibanobu/eD12HSd/newerazizisup.pdfIn PDF document text
    • https://cdn.sqhk.co/karopepagu/f70VGih/genatex.pdfIn PDF document text
    • https://zinivopupo.weebly.com/uploads/1/3/4/3/134386920/ribemivatoxigomo.pdfIn PDF document text
    • http://korecos.ru/radidixolibaredabeneblit0.pdfIn PDF document text
    • https://tijesefufejeje.weebly.com/uploads/1/3/4/8/134858706/4052501.pdfIn PDF document text
    • https://noparerekum.weebly.com/uploads/1/3/4/6/134639333/9548372.pdfIn PDF document text
    • https://labifunuvi.weebly.com/uploads/1/3/4/8/134847398/7337840.pdfIn PDF document text
    • http://bred-enligne.com/vujefijojumusezaforojinh4ox.pdfIn PDF document text
    • https://cdn.sqhk.co/tinolefowi/V0gjQFB/totally_epic_battle_simulator_online.pdfIn PDF document text
    • https://saxarewuvopa.weebly.com/uploads/1/3/4/8/134855039/9487877.pdfIn PDF document text
    • https://cdn.sqhk.co/reriwoduriju/xgfeVif/51731991656.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
    • https://77047a80-9f17-4504-a563-a097c25ca12e.filesusr.com/ugd/5c8b2f_f6674edd46364012aa2a2247d928a51f.pdf?index=trueIn PDF document text
    • https://d670dda7-df53-4ef1-8eda-d3256df28744.filesusr.com/ugd/dbbbec_6859acacfe1441e3bda6913d72fb1186.pdf?index=trueIn PDF document text
    • https://a3c35cc3-4a3f-4d41-ab51-8b3e4b114d30.filesusr.com/ugd/2b25b5_603186c3942049d6a7bcc296495d45c1.pdf?index=trueIn PDF document text
    • https://19aaccd0-9772-41b6-85c4-be118606641a.filesusr.com/ugd/a12125_528dfd558a8847a68e68f4e2a4b52da8.pdf?index=trueIn PDF document text
    • https://7be8961d-effb-4c78-a255-78c3c9f0be09.filesusr.com/ugd/3dd68e_b946af43fad64dc8b312591db4abe02d.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA96 5148 bytes
SHA-256: 5842127abb08285f288a873618f21176a37a83c9b031c012296223041f58be9b
font_01_sfnt_off0000fc1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC1A 11904 bytes
SHA-256: d3252831c183d0cda188657b62be44200893e1171fde5f8b9c129407a2c76b40
font_02_sfnt_off00012448.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12448 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2