Malicious PDF — malware analysis report

Static analysis result for SHA-256 e44a78cc40065b5b…

MALICIOUS

PDF

69.1 KB Created: 2020-12-24 11:43:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 53c9c4e84e85e393ea2aa7d50ab8be69 SHA-1: 1dba7936075dd2663c5639bc898f3e6865848aba SHA-256: e44a78cc40065b5be522aa94e19220383a69a1a907a96c2a0862d301ac389e14
186 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, many hosted on disposable domains, indicative of a link farm or phishing operation. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were directly extracted, the PDF structure and external links point towards a malicious document designed to redirect users to potentially harmful content.

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
  • 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://traffine.ru/strik?utm_term=jurassic+evolution+dinosaur+simulator+gamestop PDF link annotation
    • https://cdn.sqhk.co/zijikunu/d8cCghP/nail_it_salon_sandy.pdfIn PDF document text
    • https://tenikekiso.weebly.com/uploads/1/3/0/7/130775729/85edd96af.pdfIn PDF document text
    • https://nifogagerosore.weebly.com/uploads/1/3/5/3/135300162/xuwokeni.pdfIn PDF document text
    • https://temazojirilezin.weebly.com/uploads/1/3/2/3/132302863/a9069b58110bb6.pdfIn PDF document text
    • https://nikokabiliru.weebly.com/uploads/1/3/1/4/131409463/4513891.pdfIn PDF document text
    • https://cdn.sqhk.co/rakuvonume/Fjay5I1/electric_train_station_near_me_now.pdfIn PDF document text
    • https://pavowojavujide.weebly.com/uploads/1/3/1/3/131398322/nexitom.pdfIn PDF document text
    • https://jatokogeredere.weebly.com/uploads/1/3/3/9/133997843/bidutava.pdfIn PDF document text
    • https://lutaxabivuk.weebly.com/uploads/1/3/0/7/130740512/a7b6b47.pdfIn PDF document text
    • https://pelefazefipaguj.weebly.com/uploads/1/3/4/8/134892892/dazosukisazuriwugu.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/jexijer/30250597657.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23f8c45c-034a-444a-b81e-48b8549c6e0c/who_is_baby_lux_to_harry.pdfIn PDF document text
    • https://s3.amazonaws.com/sowewazulejewi/a_koopa_revenge_2_unblocked_77.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5409a233-c368-48e5-bcd5-9b41cc3ed49d/watch_one_tree_hill_online_season_1.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b300770-e0b3-4466-a8b4-3c1e6a26890d/rokesuketik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23e65e1c-2e30-41b9-92b9-5541990aac74/pekesa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f7a91db-190a-459d-9026-3a05980b8e47/situacion_didactica_de_expresion_y_apreciacion_artistica_musical.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_off0000cfb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFB3 5444 bytes
SHA-256: f7e54847869374b432f2f64bab819fa75df2ccc08666daaec734161ef74bd494
font_01_sfnt_off0000e224.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE224 10784 bytes
SHA-256: 6b69c99558d3415983694f8f27182d40c1192d0b797f9d6a9c7c2c824321368e