Malicious PDF — malware analysis report

Static analysis result for SHA-256 9485093331ca0ad6…

MALICIOUS

PDF

81.3 KB Created: 2021-02-27 13:17:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 067d7673ecb5641f6d968b7aa7d03859 SHA-1: b448a6ef54018d99ee4a8c243c67726a1a1edd18 SHA-256: 9485093331ca0ad6e966dcc392560ed1f9d63c0a086c9e226b2899d0da69b33c
184 Risk Score

Malware Insights

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

The PDF document was flagged by multiple heuristics as malicious, including a critical alert for linking to known malicious redirector infrastructure. The ML classifier also assigned a high probability of maliciousness. The document contains numerous embedded URLs, many of which point to disposable hosting or suspicious domains, suggesting a phishing or malware distribution attempt.

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
  • 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 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.
  • 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://crophysi.ru/award?keyword=what+do+old+navy+employees+wear In PDF document text
    • https://cdn.sqhk.co/nowavutu/Xshajif/vikusubof.pdfIn PDF document text
    • http://vvd.bar/casting_process_filelmwe6.pdfIn PDF document text
    • https://cdn.sqhk.co/xaranoraf/aDPt5jg/74557193117.pdfIn PDF document text
    • http://mexicotop3.xyz/18622112996h059n.pdfIn PDF document text
    • http://50offstore.pro/pointers_in_c_yashwant_kanetkarzdsjq.pdfIn PDF document text
    • http://urro-hu.com/13742408464tovfm.pdfIn PDF document text
    • https://nigupuwifiva.weebly.com/uploads/1/3/5/3/135329906/kanonulilef-zidetoxegose-xosuporobabotut-nurevinepaloson.pdfIn PDF document text
    • http://jusefaw.22web.org/10589971467.pdfIn PDF document text
    • http://byseles.xyz/muzofusanasopevuja6clby.pdfIn PDF document text
    • http://urolog.xyz/nitujipetzjbb.pdfIn PDF document text
    • https://fojojaroj.weebly.com/uploads/1/3/1/4/131453509/bigizipu.pdfIn PDF document text
    • https://cdn.sqhk.co/limiwebu/yGijegd/acheter_recharge_pcs_mastercard_en_ligne.pdfIn PDF document text
    • https://cdn.sqhk.co/jekefebiba/nhiDjc6/98227212330.pdfIn PDF document text
    • https://wumezovavupod.weebly.com/uploads/1/3/4/7/134741594/9958155.pdfIn PDF document text
    • https://putumilaw.weebly.com/uploads/1/3/1/3/131380263/7010290.pdfIn PDF document text
    • http://voxamuzovo.22web.org/critical_thinking_questions_and_answers_for_interview.pdfIn PDF document text
    • http://dfahsdfgjsfg.online/78734374868vgsjh.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fopekexu.epizy.com/xijeminelojozexikagalax.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_off0000f598.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF598 5464 bytes
SHA-256: 8279fd7e2fc07be5f1064d4e25ded9bc74fb21a71167faff8d86b7158a124264
font_01_sfnt_off0001081f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1081F 15528 bytes
SHA-256: f202e1334c03be13f0c738b4bad2d973346f7b05f5a5c8546ef19cf8ffac60fd

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