Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ce7e92c7b1f3cdf…

MALICIOUS

PDF

68.9 KB Created: 2021-03-15 02:30:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: afb60ea27b0e7496f34e3fbe33253cb4 SHA-1: 2a9611ef5cdb2c066c5793dcb3a5c9e780792757 SHA-256: 9ce7e92c7b1f3cdffa38d1d8aa78508b6dbed6a6271604aa8d892fc8813de7dc
244 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 finding for linking to known malicious redirector infrastructure. The document contains a large number of external links, suggesting it functions as a link farm. The presence of embedded URLs and the overall structure indicate an attempt to direct users to potentially harmful sites, aligning with phishing or SEO manipulation tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://dafemum.ru/wix?keyword=horace+mann+athletics+twitter In PDF document text
    • http://reduslim-italiaoficial.site/83226731873sq4xz.pdfIn PDF document text
    • http://rezonansmusic.com/bowibojizedidagiveleuev6.pdfIn PDF document text
    • http://manybigs.space/arizona_state_parks_camping_passyqm1j.pdfIn PDF document text
    • http://wijasagasipode.getenjoyment.net/neil_gaiman_quotes_about_libraries.pdfIn PDF document text
    • https://fezabukife.weebly.com/uploads/1/3/5/3/135345753/tifuxubed.pdfIn PDF document text
    • https://nebuxegakox.weebly.com/uploads/1/3/4/4/134404726/zogepasudizubiz.pdfIn PDF document text
    • https://furetexagorude.weebly.com/uploads/1/3/5/9/135958868/2029075.pdfIn PDF document text
    • http://aarbuz.space/yzr7j.pdfIn PDF document text
    • https://tufanemoxidubux.weebly.com/uploads/1/3/4/3/134315727/4164829.pdfIn PDF document text
    • http://zesamoa.online/which_is_the_most_coldest_city_in_canadafpsoz.pdfIn PDF document text
    • http://lizuzezusad.medianewsonline.com/astm_a370_17a_free_download.pdfIn PDF document text
    • http://bitalotava.scienceontheweb.net/rexiwidusuloguzasepebis.pdfIn PDF document text
    • http://mewibapevuwado.22web.org/dijolalulutijurem.pdfIn PDF document text
    • https://gosevitugelaw.weebly.com/uploads/1/3/4/4/134439416/duzekalevegonudom.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://1618b3f4-dcc0-4047-a816-eeb1cbe43c51.filesusr.com/ugd/a01749_20d93ce484cd4ec7abc4a7fa08cb8c24.pdf?index=trueIn PDF document text
    • https://f18b8dc1-3ce9-44bd-8712-01435d039869.filesusr.com/ugd/b97cba_54234b2353824cb88ae8d08e51250b02.pdf?index=trueIn PDF document text
    • https://013c3ecd-17dd-4738-ad87-554153c764a5.filesusr.com/ugd/36f25b_06947bf0a0e74d8abb9a70cc6e347455.pdf?index=trueIn PDF document text
    • https://19972ee8-34f0-4900-8009-9f590161cd02.filesusr.com/ugd/64db51_75e9994571d54ee6b916d62746c2edac.pdf?index=trueIn PDF document text
    • https://63dbeab4-18c6-4677-a808-17cd77aec119.filesusr.com/ugd/963d80_fc5e7d7313da4b73abf8569251377df1.pdf?index=trueIn PDF document text
    • http://fonaxijulobep.rf.gd/jogapamedozina.pdfIn PDF document text
    • http://rijemow.onlinewebshop.net/diablo_2_runes_worth_keeping.pdfIn PDF document text
    • https://4993f9ff-345c-4c03-a8ec-d4f8dac664d6.filesusr.com/ugd/debbe1_a416059bf0664d83ad483ab0ed503811.pdf?index=trueIn PDF document text
    • https://0f8fedcd-12c0-4678-86f8-e2bff7269121.filesusr.com/ugd/70e7d4_0e7cb0d1ac48487fbe2c475f43a74374.pdf?index=trueIn 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_off0000cd29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD29 5092 bytes
SHA-256: 227f57fc56f81c15533601c4d402fe709e7285a9616914f7a62f4e5007b8f60f
font_01_sfnt_off0000de56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE56 11788 bytes
SHA-256: 4ad77e6f5ecd8e90bc2daf51125ac7890a4cdf01dde25f5b24c45cfaae15f689

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