Malicious PDF — malware analysis report

Static analysis result for SHA-256 60421995e0697fc7…

MALICIOUS

PDF

129.6 KB Created: 2021-02-03 02:34:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 04054c02e4ba543f3e70625f0d257809 SHA-1: e51094adaac64319755f11811d886240b1270981 SHA-256: 60421995e0697fc7265a0564175b654d9d8b5f7964d6090fd69686c000b4b9b6
252 Risk Score

Malware Insights

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

This PDF file contains numerous links, many of which point to disposable hosting or known malicious redirectors, indicating a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing or malware distribution lure, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://yafferge.ru/aws?utm_term=vceguide+palo+alto In PDF document text
    • http://shoes-storie.club/boruto_manga_chapter_13px30z.pdfIn PDF document text
    • https://vanatajeto.weebly.com/uploads/1/3/0/7/130740174/vapenapovuwidiri.pdfIn PDF document text
    • http://wonder-ita.space/campbell_biology_in_focus_textbook64r9z.pdfIn PDF document text
    • https://tekuxarutupun.weebly.com/uploads/1/3/0/7/130775258/00a8a0c8e59.pdfIn PDF document text
    • https://sinekagu.weebly.com/uploads/1/3/4/8/134855021/8297290.pdfIn PDF document text
    • https://kagujovo.weebly.com/uploads/1/3/5/2/135298661/8674007.pdfIn PDF document text
    • http://christinaanddavid2019.com/febelufujalirimixulicueh9.pdfIn PDF document text
    • https://nakalefa.weebly.com/uploads/1/3/4/5/134522788/gowuxotuwul_tetotawo_jalof.pdfIn PDF document text
    • https://napujokid.weebly.com/uploads/1/3/5/3/135339673/ponamojos.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://reditavipesef.rf.gd/nezuwajasaku.pdfIn PDF document text
    • http://zadiken.rf.gd/mountain_bike_size_guide_wheels.pdfIn PDF document text
    • http://fuvituze.epizy.com/sabedo.pdfIn PDF document text
    • http://fupuzujovo.epizy.com/jurnal_akuntansi_pemerintahan.pdfIn PDF document text
    • http://susesibukof.epizy.com/20415157036.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001b129.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B129 4708 bytes
SHA-256: a68ebfc2d9acf415c8be32f8a1093f410dd16fd2430f0835c3db163c1bc8d44d
font_01_sfnt_off0001c138.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C138 12236 bytes
SHA-256: b852be3edefa97c343f8076eefbc8b7487d81c5ee07ac785287c6c0e1b117570
font_02_sfnt_off0001eaaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1EAAA 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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