Malicious PDF — malware analysis report

Static analysis result for SHA-256 d526bbf4b97b1572…

MALICIOUS

PDF

85.0 KB Created: 2021-04-02 16:55:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 8fd74a94838dbbf62d4622b94cd54049 SHA-1: d3d28830ef3cc9fd4e76bd977c1392207c263d24 SHA-256: d526bbf4b97b1572ee9ba59fca48e801942e4b7e4f48a5af5b5335b9acfd91de
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for Pdf.Phishing.Trojan. The file contains a large number of external links, many hosted on disposable domains or platforms like Weebly, suggesting a link farm or phishing campaign. The document body, though heavily obfuscated, contains metadata related to 'Rift outfitter leveling guide', indicating a lure to attract users to potentially malicious content hosted on the extracted URLs.

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://fokemale.ru/wix?keyword=rift+outfitter+leveling+guide PDF link annotation
    • http://grafoanaliz.ru/delay_dont_deny_facebook31lcz.pdfIn PDF document text
    • https://birivuben.weebly.com/uploads/1/3/4/6/134618962/gofegewufoto_lowejexov.pdfIn PDF document text
    • http://nesobaka7.xyz/wow_inscription_guide0qe1k.pdfIn PDF document text
    • https://dejokorakas.weebly.com/uploads/1/3/1/3/131379117/wunipijetij-kibez.pdfIn PDF document text
    • http://nudistoff.club/gizojejetujovugeluluzusugb370.pdfIn PDF document text
    • https://tiposowa.weebly.com/uploads/1/3/1/1/131164246/zezamuxijexisute.pdfIn PDF document text
    • https://rurajisikite.weebly.com/uploads/1/3/0/8/130813509/1642801.pdfIn PDF document text
    • http://bluebadgeapproval.com/86902851705b0lgx.pdfIn PDF document text
    • https://bopidojosonek.weebly.com/uploads/1/3/1/3/131384153/5090966.pdfIn PDF document text
    • https://rajuwirorevub.weebly.com/uploads/1/3/5/3/135306937/0737fc.pdfIn PDF document text
    • http://apkweb.net/4776132685589dnb.pdfIn PDF document text
    • https://buxexemap.weebly.com/uploads/1/3/4/8/134890763/sonopiketir.pdfIn PDF document text
    • http://yewes.space/birds_tweeting_sound_effect_free7voqc.pdfIn PDF document text
    • https://zavamemedu.weebly.com/uploads/1/3/4/3/134305249/gasek-kumon-dikenakasi-xerajad.pdfIn PDF document text
    • https://dojixevagix.weebly.com/uploads/1/3/2/6/132682303/5b1a4add.pdfIn PDF document text
    • https://rimozaruminipa.weebly.com/uploads/1/3/5/3/135391391/4347221.pdfIn PDF document text
    • https://lemorixumo.weebly.com/uploads/1/3/4/7/134748879/pujatoz_gikekumetusen.pdfIn PDF document text
    • http://igcopyrightverify.com/what_is_typography_web_designcsk57.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off00010f7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F7B 4756 bytes
SHA-256: 86491b63946556c50a208e52b708ac60db1f6a411d2828e6f15fb6d1658415d3
font_01_sfnt_off00011fc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FC7 11372 bytes
SHA-256: f84569d11eec90941b2e46d1827ca26127f7f4c3df273f3a62a7884392a0677a

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