Malicious PDF — malware analysis report

Static analysis result for SHA-256 517d7edf73be8d6a…

MALICIOUS

PDF

69.2 KB Created: 2021-02-05 04:48:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 54b2b9e39f21a3815be6714fccbc0a58 SHA-1: e3022cb2cd99bedc4dfbf7ae12b4d13abc2c39c6 SHA-256: 517d7edf73be8d6a8ca28971dd9beb266f1ba68fe78a54f3227884273a5a965f
156 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 0.9998

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://crophysi.ru/aws?utm_term=autodesk+fusion+360+crack PDF link annotation
    • http://tubudemawaxoki.iblogger.org/consolidated_balance_sheet_problems_and_solutions.pdfIn PDF document text
    • https://cdn.sqhk.co/riketumes/bAheih7/55120777378.pdfIn PDF document text
    • https://xavexipaw.weebly.com/uploads/1/3/1/6/131636683/rofebine.pdfIn PDF document text
    • http://zazujig.22web.org/natural_beauty_tips_in_tamil_app.pdfIn PDF document text
    • https://cdn.sqhk.co/pubisifibuj/hchhjdc/74279282391.pdfIn PDF document text
    • https://widegavadiwudux.weebly.com/uploads/1/3/5/3/135325068/7945172.pdfIn PDF document text
    • https://cdn.sqhk.co/jabosuve/gNidjaT/7634865129.pdfIn PDF document text
    • https://cdn.sqhk.co/surudije/hjjPibA/ace_commando_game.pdfIn PDF document text
    • https://miwidikanizi.weebly.com/uploads/1/3/4/0/134016908/pudarigonebusi_kejefonibalep_mefenika_jevelagapu.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/zakunafu/red_proto_drake_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/fonibinaraj/moral_stories_in_telugu_free.pdfIn PDF document text
    • http://midotujeg.rf.gd/79803082734.pdfIn PDF document text
    • https://s3.amazonaws.com/tomamujuf/good_morning_photo_mp4.pdfIn PDF document text
    • https://s3.amazonaws.com/fisulefajow/aptis_listening_test.pdfIn PDF document text
    • https://s3.amazonaws.com/ribowexulo/wogutewotipoj.pdfIn PDF document text
    • https://s3.amazonaws.com/jefobexapulow/94898128872.pdfIn PDF document text
    • https://s3.amazonaws.com/xisakazelelinim/buddhism_in_india.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d16e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD16E 5496 bytes
SHA-256: a35c9f05b5921a63214eb985a53a1a42ccd691fba355630ca5634610110ffbc8
font_01_sfnt_off0000e430.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE430 10600 bytes
SHA-256: b0bf8b03e590a8d34d98ac666bd7370416060413a15fedeeb28ee934fc91b84e

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