Malicious PDF — malware analysis report

Static analysis result for SHA-256 a04959bb5c32879e…

MALICIOUS

PDF

79.3 KB Created: 2021-03-13 19:02:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: fac028d7c8a13057cdf5f47e335ae3ad SHA-1: 058515ec0cd492185fb06191a9b932298b091797 SHA-256: a04959bb5c32879ebc75231a817ce1ad43d06b4c668d35b3cc998c6799edef85
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious. It contains a large number of external links, indicating a potential link farm or phishing attempt. The ClamAV detection further supports its malicious nature, identifying it as Pdf.Phishing.Trojan. No scripts were extracted, but the embedded links are the primary indicators of malicious activity.

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://zajinet.ru/wix?keyword=diablo+3+demon+hunter+leveling+guide PDF link annotation
    • https://nowiwadigomu.weebly.com/uploads/1/3/4/0/134018048/3572bf343bf158a.pdfIn PDF document text
    • http://tubesebove.medianewsonline.com/recursos_renovables_ejemplos.pdfIn PDF document text
    • https://cdn.sqhk.co/gujowaxexag/hQKmr9C/rainbow_dash_coloring_sheet.pdfIn PDF document text
    • http://visiblawty.com/whirlpool_dishwasher_quiet_partner_ii_clean_filterpvm1s.pdfIn PDF document text
    • https://cdn.sqhk.co/wofikubid/hiPgfPM/play_store_apk_downloader.pdfIn PDF document text
    • https://lojanoper.weebly.com/uploads/1/3/5/4/135400197/e02c60fead55c.pdfIn PDF document text
    • https://cdn.sqhk.co/manuguwe/RZjjLgc/wugokelironetofenajiriker.pdfIn PDF document text
    • http://kufejat.sportsontheweb.net/91871700128.pdfIn PDF document text
    • https://cdn.sqhk.co/pafatewodoju/7ibijic/wujemositigepodu.pdfIn PDF document text
    • http://leomannapov.com/38300107570ppwx7.pdfIn PDF document text
    • https://jejepijukutu.weebly.com/uploads/1/3/4/1/134131362/tegefobijitej-tajowugezudo.pdfIn PDF document text
    • https://wajevubal.weebly.com/uploads/1/3/4/6/134687537/b061e4.pdfIn PDF document text
    • https://vewutuzukep.weebly.com/uploads/1/3/2/8/132815207/zenurojib_bozemesu_gipofexizepor_luvegup.pdfIn PDF document text
    • https://cdn.sqhk.co/xejoverol/ieicHic/cnbc_schedule_usa.pdfIn PDF document text
    • http://bukipumil.mypressonline.com/givuninaviromidajexeti.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/ladojenefe/wutuwuxetejagifed.pdfIn PDF document text
    • https://s3.amazonaws.com/xedewofuretujo/39445709965.pdfIn PDF document text
    • https://s3.amazonaws.com/tamobalasu/69643565198.pdfIn PDF document text
    • https://s3.amazonaws.com/nevowimo/fugafomura.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_off0000f564.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF564 5424 bytes
SHA-256: 056775a5407adfc56048a2a693e136df89968dce5a50ad92399a5e92148a7ab7
font_01_sfnt_off000107b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107B3 11276 bytes
SHA-256: 2eba2fc98c394a03005b955edc1003c6d8456ea4786cd2990bf94a0e6d414295

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