Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7387b5cfacf58db…

MALICIOUS

PDF

79.4 KB Created: 2021-03-08 01:44:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 9c1ddd732ed4dc6fed82baed88d6fe9c SHA-1: 64f71dcbfbb8577483d01fe6a2f27f9360796bb4 SHA-256: d7387b5cfacf58db530fcfcfa2db61705af485521ff695ae76f6edf387eaa4d4
126 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 domains and employing UTM parameters, indicative of a phishing or link-farming scheme. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are consistent with techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jottigo.ru/strik?utm_term=international+mail+cost+calculator PDF link annotation
    • https://cdn.sqhk.co/pefisemise/il6jf8u/table_tennis_masters_league_a_scores.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471512/normal_5fcf9e1fbf33e.pdfIn PDF document text
    • https://mojogobiwed.weebly.com/uploads/1/3/4/7/134747953/jiwinajanegebetu.pdfIn PDF document text
    • https://zedetebi.weebly.com/uploads/1/3/1/0/131070456/sipesiwe-getibaritufaxi-zokemojifevamul-komiba.pdfIn PDF document text
    • https://cdn.sqhk.co/xovenekot/gjYghsU/playstation_5_release_date_2020_target.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490736/normal_6034fa2b3b45b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470207/normal_602c8af6b3f1f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463809/normal_6041cd809f4e4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381528/normal_60257e1c15989.pdfIn PDF document text
    • https://sixikubirosepup.weebly.com/uploads/1/3/3/9/133997641/93ea86ad6fa9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480758/normal_5ff2584bb0715.pdfIn PDF document text
    • https://cdn.sqhk.co/fekigimuzib/jjajPjf/nodusa.pdfIn PDF document text
    • https://cdn.sqhk.co/loganidob/buihe7u/bufukunolapewobabebow.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414174/normal_5feeaab26a868.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://s3.amazonaws.com/jexijer/statin_treatment_guidelines.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6ba3f81-2afc-4072-b642-8b76bf6f8489/how_to_compress_an_audio.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b063c6df-aef9-4adf-a1a0-ec58137e7e90/30620796336.pdfIn PDF document text
    • https://s3.amazonaws.com/netinuwa/barishan_song_video.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff776c4e-eb0c-411a-8f0f-879883bb8357/75716797223.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1e83fcc-d9de-4a83-a7d7-7b7d9f9f7f24/coachmen_mirada_cost.pdfIn PDF document text
    • https://s3.amazonaws.com/zodawanuror/fusisijozadikogijuborezev.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_off0000ecf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECF8 4764 bytes
SHA-256: 139d7be3cff9ec5c4c35c2930d53f5f1a7e119c586e979ab7496c694a6a43586
font_01_sfnt_off0000fcfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCFB 10308 bytes
SHA-256: 96d25ec310bd29784f22e81148cd41e678e9bfc5f3580cab420602633b2ba78b
font_02_sfnt_off00012021.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12021 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

Open this report in the interactive analyzer, or submit your own file for analysis.