Malicious PDF — malware analysis report

Static analysis result for SHA-256 e72336c287696a17…

MALICIOUS

PDF

77.1 KB Created: 2021-05-21 01:19:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: c771ae255d8fb978e7d3f0a87400382d SHA-1: 4aa0720c158f7bbcf1a4cf95a90451e2babe9a5c SHA-256: e72336c287696a178563631e2f9bdfb6f6b9a30ef7808d182a37cdbf5c9f17a6
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one heuristic specifically identifying a 'PDF_SEO_LINK_FARM' suggesting a large number of outbound links. The primary malicious URL, https://nipisod.ru/strik, is likely used to host phishing content or redirect to further malicious sites. ClamAV and ML classifiers also flagged this PDF as malicious, indicating a high probability of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • 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.
  • 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://nipisod.ru/strik?utm_term=how+to+save+a+bank+statement+as+a+pdf PDF link annotation
    • https://joxeluduxena.weebly.com/uploads/1/3/4/7/134772203/e9292827429a.pdfIn PDF document text
    • https://tonituligavu.weebly.com/uploads/1/3/4/8/134884188/255774.pdfIn PDF document text
    • https://zovavofesaduj.weebly.com/uploads/1/3/4/7/134770402/7400837.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c13967d-66d3-413f-843b-1a54382bdb85/how_to_solve_physics_problems_faster.pdfIn PDF document text
    • https://s3.amazonaws.com/doxifuba/consumer_reports_dehumidifier_issue.pdfIn PDF document text
    • https://s3.amazonaws.com/gusule/franny_e_zooey_salinger_recensione.pdfIn PDF document text
    • https://s3.amazonaws.com/tokit/congressional_research_service_reports_and_issue_briefs.pdfIn PDF document text
    • https://s3.amazonaws.com/dobesogum/mejeb.pdfIn PDF document text
    • https://s3.amazonaws.com/fojaxexino/are_fire_ants_and_harvester_ants_the_same.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0384df58-aa03-448f-8d6d-2aa70405012f/2009_international_property_maintenance_code.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c55c899d-215d-4bd2-98c6-f74524819890/night_owl_x_no_signal.pdfIn PDF document text
    • https://s3.amazonaws.com/kugelilizibuwum/begikisurutinuroxivupev.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b78d5381-a8dd-4367-a3d5-407a074a2f35/67449494168.pdfIn PDF document text
    • https://s3.amazonaws.com/jitimesolagun/natekaronajubekibol.pdfIn PDF document text
    • https://s3.amazonaws.com/pilazi/cisco_umbrella_insights_ordering_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/795f3b62-7832-4246-acf4-cf1cc3a57829/21469575150.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09b6298b-23b3-4167-b9a3-04933d501900/7889708595.pdfIn PDF document text
    • https://s3.amazonaws.com/libeganot/song_of_solomon_5_16_kjv.pdfIn PDF document text
    • https://s3.amazonaws.com/sezebepit/zadodazuja.pdfIn PDF document text
    • https://s3.amazonaws.com/zetubakuz/baby_groot_and_baby_yoda_rap_battle.pdfIn PDF document text
    • https://s3.amazonaws.com/vetamedisoz/29340953551.pdfIn PDF document text
    • https://s3.amazonaws.com/vuzotisenixava/bujanabezoboz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e18e7134-17a9-449f-8006-edaf3105f35d/50553792097.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_off0000f02d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF02D 5376 bytes
SHA-256: 689ae94783363a485ade43bcecb490ceedc7630a47facc0f48c8c731f6898238
font_01_sfnt_off0001027d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1027D 10632 bytes
SHA-256: 6f240052bd39fd325edd8fdd0b2e92c6502d3acb24d40003b865450fff24efdc

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