Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a041b9cbcfc8f0b…

MALICIOUS

PDF

85.1 KB Created: 2021-03-03 00:42:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: cf9e5bc3a4b0b8f2da94e1fa694a5ca3 SHA-1: 28089ddc6f37e492b612653a2c874b4b155db8a3 SHA-256: 7a041b9cbcfc8f0bde3d1eef7ff22cd8cd6b5e75c46b6ef4afd726427804f748
126 Risk Score

Malware Insights

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

The PDF file contains numerous links to external resources, many of which are hosted on disposable domains and appear to be part of a link farm designed to obscure the ultimate destination. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. The presence of a specific search term in one URL suggests a targeted lure for users searching for drivers.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jacksth.ru/123?utm_term=dell+latitude+e6530+wifi+driver+download PDF link annotation
    • http://dwatches.site/ap_bieap_hall_ticketsddrlc.pdfIn PDF document text
    • https://cdn.sqhk.co/rowavarop/dMGcgjZ/77602041166.pdfIn PDF document text
    • http://vawurabel.mygamesonline.org/22798609480.pdfIn PDF document text
    • http://flipping-car.online/javemixagazerfdqv.pdfIn PDF document text
    • https://livubefelamujir.weebly.com/uploads/1/3/4/8/134899239/67b8148.pdfIn PDF document text
    • https://zozolunefa.weebly.com/uploads/1/3/5/3/135325744/zefojejarij.pdfIn PDF document text
    • http://xulodol.mygamesonline.org/3_phase_voltage_in_kuwait.pdfIn PDF document text
    • https://cdn.sqhk.co/sixitigoxeto/9giaEZP/38781589279.pdfIn PDF document text
    • https://subefivu.weebly.com/uploads/1/3/4/6/134688636/4061920.pdfIn PDF document text
    • https://cdn.sqhk.co/gufojakig/fiIR3he/sokijebitefepe.pdfIn PDF document text
    • https://gijagexerifaru.weebly.com/uploads/1/3/5/3/135322880/0e3ca9.pdfIn PDF document text
    • http://sepoxudozixo.sportsontheweb.net/silawugifusesitaburo.pdfIn PDF document text
    • https://cdn.sqhk.co/rubutemoxe/jAgjajj/48997815006.pdfIn PDF document text
    • http://springwin.space/vewisabexokelowokugunuredn3313.pdfIn PDF document text
    • http://xatakafigudu.getenjoyment.net/70832753203.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://magajavopisili.epizy.com/ripetazum.pdfIn PDF document text
    • http://zikoliduxa.atwebpages.com/dawewexawetek.pdfIn PDF document text
    • http://nununad.myartsonline.com/rusagamadirab.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_off00010f38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F38 5456 bytes
SHA-256: 52bb019db947f0ca7d3105a30393cb43bafc92d0d75c556c78e9d42f3cf7ac02
font_01_sfnt_off000121fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121FB 10908 bytes
SHA-256: 17c47521cf46a5a9caa6b7f2e2a9d09caa8cc199c7d205fc62d0beb76bfd76c9

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