Malicious PDF — malware analysis report

Static analysis result for SHA-256 134365bd335e5c5a…

MALICIOUS

PDF

118.6 KB Created: 2021-03-21 04:00:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 20699acd57cfc47593b123dd3e54bbbb SHA-1: c7aafebe7cadbee4bb32830ba55d27b6d05760c0 SHA-256: 134365bd335e5c5a63725858f46bb013d4f77a4bac0431ed09b7cedc75b6346f
206 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, presenting numerous external links, many hosted on disposable domains, under the guise of providing a downloadable book. The primary URL, 'https://xezojetit.ru/strik?utm_term=garbh+sanskar+book+in+hindi+pdf+free+download', suggests a lure related to book downloads, likely to redirect users to further malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 7

  • PRC/3D content in PDF medium CVE related PDF_PRC_3D
    PDF contains PRC 3D content. PRC/U3D parsers have been a recurring Adobe Reader attack surface; treat as a related parser-exploit indicator rather than a specific CVE match.
  • 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 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.
  • 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://xezojetit.ru/strik?utm_term=garbh+sanskar+book+in+hindi+pdf+free+download PDF link annotation
    • https://duniterete.weebly.com/uploads/1/3/4/6/134690204/zexowabozitape.pdfIn PDF document text
    • https://dapadode.weebly.com/uploads/1/3/4/6/134646205/1478b2ce1a28.pdfIn PDF document text
    • https://guwuviwanawa.weebly.com/uploads/1/3/2/6/132695801/7f0a2.pdfIn PDF document text
    • http://mumezofenina.22web.org/73113394545.pdfIn PDF document text
    • https://tavefagizukog.weebly.com/uploads/1/3/0/7/130775361/0f3c2ff099545d7.pdfIn PDF document text
    • https://katibaluzopoxu.weebly.com/uploads/1/3/0/7/130738884/3062550.pdfIn PDF document text
    • https://rofaxebawo.weebly.com/uploads/1/3/4/7/134750080/779ea.pdfIn PDF document text
    • https://fexalikinuzumow.weebly.com/uploads/1/3/5/3/135324316/4253092.pdfIn PDF document text
    • https://patapirebitogi.weebly.com/uploads/1/3/0/8/130814085/zadimugofobewawu.pdfIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://1ebfeea1-7d02-43b8-8f0a-002c87bc7f75.filesusr.com/ugd/50dcf6_d43316d046a740f0b6d103f7b65991eb.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/49724ffe-6a52-4766-a77e-c6adb27c15b9/83944835422.pdfIn PDF document text
    • https://s3.amazonaws.com/kisimujuk/sozejefizobuxesinig.pdfIn PDF document text
    • https://cf62593c-3f62-494e-9ef9-3c2a63ead7d7.filesusr.com/ugd/93dae2_21c7f00b5d01446aad9925d45515b648.pdf?index=trueIn PDF document text
    • https://5a20c861-23fd-468b-888e-078c5342874f.filesusr.com/ugd/924841_d3a23eea569f4ed093973e6afe52ebd1.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wufujudisu/allstate_auto_insurance_forms.pdfIn PDF document text
    • http://josunida.epizy.com/53276395051.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00f4a31f-2b3f-4eda-81c3-4f68a0ccc4e2/redojalimeroponapi.pdfIn PDF document text
    • https://s3.amazonaws.com/xunilukegez/aluminum_sheets_for_enclosed_trailer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2973ea18-91ac-4496-85d3-99776e9e5b74/liwidukelalonefedi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8da2dc2a-f174-4750-b215-79c914895057/mackie_1604_service_manual.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off000191b2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x191B2 20636 bytes
SHA-256: 3185f471b3c2813911f8757a63acf54b68b185184facca9b052b612d42d87cb1
font_00_sfnt_off00014fb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14FB8 5456 bytes
SHA-256: fc6c839723a5587bf79e145d4dab4ba48d5db50cab130cd265d89314fd295034
font_01_sfnt_off00016248.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16248 3720 bytes
SHA-256: d5ecec3e822993868ba70e247019bcdb656a9fee58d620eb93bc70658e929280
font_02_sfnt_off00016dab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16DAB 10444 bytes
SHA-256: b11280d8f4566bd1701ce15ce4a55a251db4c33cef31fe49c8a51feb108e3d7a

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