Malicious PDF — malware analysis report

Static analysis result for SHA-256 484acc9126cb0e65…

MALICIOUS

PDF

70.8 KB Created: 2021-02-26 00:44:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 9067ccec6098882a38565a60de8ef2b1 SHA-1: b66bd1b087cb0d8527db817b17bbd6bd8c0c0490 SHA-256: 484acc9126cb0e65b4f9f2ecd6e50a4716a1fee2ce0143e5c46374e7c5885fed
126 Risk Score

Malware Insights

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

The PDF contains numerous external URIs and is flagged as a link farm on disposable hosting, indicating a malicious intent to redirect users. The ML classifier and ClamAV detection strongly support its malicious nature. While no scripts were explicitly extracted, the presence of embedded URIs suggests potential for further malicious activity, such as phishing or malware distribution.

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 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://leonvi.ru/wix?keyword=cooking+fever+automatic+machine+alpine+meat+palace PDF link annotation
    • https://pigudoxuwupif.weebly.com/uploads/1/3/1/4/131437670/6513453.pdfIn PDF document text
    • https://vagenovujod.weebly.com/uploads/1/3/1/3/131398358/gazifiseb.pdfIn PDF document text
    • https://cdn.sqhk.co/tosilura/bRy8VJm/punitufanogeludepiw.pdfIn PDF document text
    • https://cdn.sqhk.co/ponesigis/3bsn8fM/boss_waza_tuner_buffer.pdfIn PDF document text
    • http://byseles.xyz/pajevifonuwerawuwonamevio0zq7.pdfIn PDF document text
    • https://cdn.sqhk.co/tukutabu/hfoy0jd/funavejukomobukibu.pdfIn PDF document text
    • https://cdn.sqhk.co/bemoranoz/ighaqhj/14726823401.pdfIn PDF document text
    • https://vusowixaxepuw.weebly.com/uploads/1/3/1/3/131381533/dilabuwagami.pdfIn PDF document text
    • http://teren.fun/apollo_twin_usb_casezbt2m.pdfIn PDF document text
    • https://cdn.sqhk.co/balatexoriv/aEPQ9Eg/descargar_empire_war_age_of_heroes_apk.pdfIn PDF document text
    • http://pasendapp.online/glary_utilities_5_freedyci1.pdfIn PDF document text
    • https://cdn.sqhk.co/joxutedunik/gcXLdid/52761500851.pdfIn PDF document text
    • https://cdn.sqhk.co/pumopijaku/yhhgcq5/xuselokuwakebaxi.pdfIn PDF document text
    • http://fit-italy.space/vilatirimugfchr.pdfIn PDF document text
    • https://bivilasafufi.weebly.com/uploads/1/3/4/6/134689398/sobakedifoduti-xumat-dowijifo.pdfIn PDF document text
    • http://cosmicgig.com/bears_ears_national_monument_mapb86e6.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/venunamazozuzo/32114454916.pdfIn PDF document text
    • https://s3.amazonaws.com/lusegokaves/bananajotuwinidu.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_off0000d8cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8CF 5280 bytes
SHA-256: f424e2da69a68b5ae379fb243516b7dd432f37705c55713b62127735d0bc7c45
font_01_sfnt_off0000eaae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAAE 10148 bytes
SHA-256: fb325cdeb28a08a283819c9322e179c56fd0d10958de1971ddd9fb2ed3769de2

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