Malicious PDF — malware analysis report

Static analysis result for SHA-256 eee63f45f7d9512f…

MALICIOUS

PDF

82.5 KB Created: 2021-03-16 19:15:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 8dca0526151b5961ab6194725b5b107e SHA-1: b5a6a326851e4f5ab04d3304524b69e1cb5e8eb4 SHA-256: eee63f45f7d9512fd5e0c003787af55a08ae124cf369d62d59957478b90abf19
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://leonvi.ru/strik?utm_term=logitech+z323+2.1+speaker+system+30+w+rms+schwarz PDF link annotation
    • https://cdn.sqhk.co/nobixapo/eG1Ejck/63577360115.pdfIn PDF document text
    • https://cdn.sqhk.co/wujugojuse/jajbajh/fovimojowojadifobi.pdfIn PDF document text
    • http://rat-red.space/785270352502v8hk.pdfIn PDF document text
    • https://vutepunuvo.weebly.com/uploads/1/3/1/6/131637517/1628263.pdfIn PDF document text
    • https://cdn.sqhk.co/numavagoko/jaqc2W7/kopokufipa.pdfIn PDF document text
    • https://wojanoxunoliwam.weebly.com/uploads/1/3/5/3/135394081/xakulomeg.pdfIn PDF document text
    • http://creditinquiry.info/27447166825vyxhu.pdfIn PDF document text
    • https://cdn.sqhk.co/vatukaso/iIDgcgc/college_basketball_coach_salary_d3.pdfIn PDF document text
    • https://cdn.sqhk.co/tejikeluz/mifUuia/best_nail_salon_near_me_open_now.pdfIn PDF document text
    • https://malugula.weebly.com/uploads/1/3/2/6/132695531/pazumakesabesa.pdfIn PDF document text
    • http://mamontov-net.cc/60246525903pansu.pdfIn PDF document text
    • https://cdn.sqhk.co/pelopuxi/sgeq4he/tech_geek_store.pdfIn PDF document text
    • https://cdn.sqhk.co/xezojutatow/dMibbAO/65824462984.pdfIn PDF document text
    • https://solusolifodijal.weebly.com/uploads/1/3/4/4/134433047/belapidonejojifalus.pdfIn PDF document text
    • https://cdn.sqhk.co/suwajipufo/jjcx10Y/loner_yungblud_lyrics_traduction.pdfIn PDF document text
    • http://itsnat.space/what_does_adaptive_behavior_skills_meanbp39t.pdfIn PDF document text
    • https://ragulifogikub.weebly.com/uploads/1/3/3/9/133986704/a9d1082698.pdfIn PDF document text
    • https://cdn.sqhk.co/zijigemeworu/nxjdhZ0/free_robux_hack_no_robot_verification.pdfIn PDF document text
    • https://cdn.sqhk.co/wibafozadil/bIPgiVb/offline_world_atlas_app.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://ae0ecf71-49bb-4ac4-bba4-d0f2a20d1af9.filesusr.com/ugd/668a47_97c19bf19e9142738fe544e7b0a09b8d.pdf?index=trueIn PDF document text
    • https://3175e58c-9db9-4d87-bcb9-15e03531d93d.filesusr.com/ugd/c93210_fd4f7cdad08c4b8483cec5c0147dc775.pdf?index=trueIn PDF document text
    • https://0298dc5a-7924-4276-8279-06452a5288da.filesusr.com/ugd/b30cf0_adc10b459d694e748b81535d0ad38419.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_off000100b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100B0 6084 bytes
SHA-256: 18cb9f1fff27aa84df3bc833e756e46a7fbd5daf15a21bb561e6066e99488a79
font_01_sfnt_off0001156d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1156D 11480 bytes
SHA-256: 021ab1b21d645002ba78f41fe2e1164af785566e6bca4dac0a65296d17199709

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