Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb377e1543a723cd…

MALICIOUS

PDF

78.4 KB Created: 2021-03-24 20:19:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 55113231d5e4d6dc84692ae1e5226783 SHA-1: df2a495cfe8503859b3da516d99415eb2aad73b9 SHA-256: eb377e1543a723cd58e0265c3b7c65beb0bd2ad956e8de020a4b10807a4e6f4f
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous external URLs, with a critical heuristic firing for a large number of links pointing to potentially malicious or disposable hosting sites. The primary URL identified, 'https://jottigo.ru/wix?keyword=ben+10+generator+rex+heroes+united+episode+list', and a linked PDF from 'weebly.com' are flagged as suspicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://jottigo.ru/wix?keyword=ben+10+generator+rex+heroes+united+episode+list PDF link annotation
    • https://wefidabewurar.weebly.com/uploads/1/3/1/1/131164485/wulobemaned-pujoxagatigarum-sixokolira.pdfIn PDF document text
    • https://neninilez.weebly.com/uploads/1/3/3/9/133986457/fcd1be3e8e7.pdfIn PDF document text
    • https://rupevegix.weebly.com/uploads/1/3/4/8/134887155/tokurobelolikim_nenokibululebud_bixekukukim.pdfIn PDF document text
    • https://tazowodogakog.weebly.com/uploads/1/3/1/4/131437711/dovab.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/42afcb71-7817-4bc3-a895-6b83dea69525/blue_eyed_mini_dachshunds_for_sale.pdfIn PDF document text
    • https://61df3396-90b5-4b69-a3ae-475c9da6ebc5.filesusr.com/ugd/516574_7ffe08dd346c40909563d347e5096830.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0310620a-2630-4689-b48a-8079913c0999/vezefowunuxijomu.pdfIn PDF document text
    • https://f3b8d348-8566-49c9-a9f8-a2c3b9e1bc8e.filesusr.com/ugd/f1c748_9f4b535869854c688e2a7b70189fa2df.pdf?index=trueIn PDF document text
    • https://95043331-d9de-4498-ad98-35b8ac3ee23f.filesusr.com/ugd/5740b2_ef88fc5d34e54354964d0a3fa23c55c7.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/585c7dc8-bc4d-421f-8807-ed2ccc493b1a/nuzobi.pdfIn PDF document text
    • https://18e7ef82-5c75-44fe-ae22-4c356c2c9ce0.filesusr.com/ugd/749e61_52ef34286abb4a9b85d82d1f07a50e5c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b843afd-e582-4842-937c-d3b6083adb09/59312507260.pdfIn PDF document text
    • https://66547991-fb4b-492c-b271-2b6457db34f0.filesusr.com/ugd/a98e70_4d2605aaa0994f6da4e954c2b8fc4f2c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/66fc1ae4-87c0-44ea-affe-53d205754173/john_deere_gt235_power_flow_bagger_installation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5063485-2380-49ef-aa16-6595a5939f0f/cloud_9_vape_cartersville_ga.pdfIn PDF document text
    • https://f7cac2f2-528f-490f-9bef-cb2448a877de.filesusr.com/ugd/529ba0_bc2a447bdd164e9c995f73d6b8e7f26c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/59866fd7-f18c-4095-a208-17fd26e0fca7/que_es_un_sistema_de_referencia_inercial.pdfIn PDF document text
    • https://636e06b3-920c-4898-b827-ef778bbbc101.filesusr.com/ugd/40512e_b18d3de0331d454eadab3afdfd0fa00c.pdf?index=trueIn PDF document text
    • https://e7ba4f66-d023-404d-a355-a5b98970f127.filesusr.com/ugd/cac9e4_3bb54c44d9a24a0cbe862750aefdc6b3.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_off0000f14a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF14A 5532 bytes
SHA-256: 0cb04f1cbdd523a860ee9e8342026b0b36ca42b49684643b3502b7d479115810
font_01_sfnt_off00010423.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10423 11092 bytes
SHA-256: 66f40a123de1a37fa88659daf950aae1849dbea5fb4b8518666e6618e7d10fa8

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