Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a2230410eedc095…

MALICIOUS

PDF

124.5 KB Created: 2021-05-07 01:28:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: ba3ac128b104a0f0ebeb9d250bb735b6 SHA-1: 71ae29835328f38c1a8a0c5747d997289b8c8180 SHA-256: 5a2230410eedc095c2a7272d6a14cc5ea4b872b7d845a56f713b770efd21573f
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 0.9978

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://lozipotod.ru/strik?utm_term=how+to+get+your+ex+boyfriend+back+through+text PDF link annotation
    • http://winoxolupuvil.getenjoyment.net/fovazujosomawilimilexod.pdfIn PDF document text
    • http://kajejib.medianewsonline.com/ecologia_y_gestion_ambiental.pdfIn PDF document text
    • http://xuxikurov.mygamesonline.org/arthritis_back_exercises.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://e26dc784-fa46-4601-9f6d-57686faaf216.filesusr.com/ugd/c66525_0c3d64a88bca4a529ba3249494f1a3d9.pdf?index=trueIn PDF document text
    • http://wewimolu.epizy.com/phillips_biomateriales.pdfIn PDF document text
    • https://s3.amazonaws.com/goviwigax/43913475364.pdfIn PDF document text
    • https://s3.amazonaws.com/xopugup/pepuwozinutijineteninet.pdfIn PDF document text
    • https://121f8fc1-d270-4171-a721-8ccd656fc20f.filesusr.com/ugd/2ca22b_7bfdb51a52c04fcdbb64f616075b934b.pdf?index=trueIn PDF document text
    • https://c0a42e0f-4cce-4e1b-84a6-2a5440198d67.filesusr.com/ugd/440b6d_944f31b237ca4eab85f54e24055ecdf7.pdf?index=trueIn PDF document text
    • http://xupudajiwozov.epizy.com/50441902756.pdfIn PDF document text
    • https://09235f31-469a-4613-94fc-36d04c1f642a.filesusr.com/ugd/8b6407_24d24fcac22c4e69b9b50829a69ec2f5.pdf?index=trueIn PDF document text
    • http://zakefuki.myartsonline.com/doxed.pdfIn PDF document text
    • https://s3.amazonaws.com/tokudapele/91193263797.pdfIn PDF document text
    • http://joriboka.epizy.com/botiperoji.pdfIn PDF document text
    • https://528f6e5c-6927-42ef-b7a5-a8f9c349750c.filesusr.com/ugd/07b979_74e7485d0e3848eea789877507609f26.pdf?index=trueIn PDF document text
    • https://6f2fb29c-15f2-4b08-b525-3eb91a7f0a41.filesusr.com/ugd/c3548c_1cb31b19519f4ef29cb5035e76a9db09.pdf?index=trueIn PDF document text
    • https://5e0c4d4d-41f9-428c-9564-b93e7cff6769.filesusr.com/ugd/510691_f09ecc9e5dd0473f9f4a7fa2d243cd4e.pdf?index=trueIn PDF document text
    • https://d75bbb92-b0e4-4b50-83e6-2443e695523b.filesusr.com/ugd/bc73b9_f1dd72418f6a484d99b16b654129c2a7.pdf?index=trueIn PDF document text
    • http://zegiwewezenaro.myartsonline.com/another_word_for_bringing_back_memories.pdfIn PDF document text
    • https://a7193630-a032-4ee2-b136-33837135b76a.filesusr.com/ugd/fac845_44f119de2d7b4e44b7768ea6803e4157.pdf?index=trueIn PDF document text
    • https://79d86aa2-23c4-4aa0-a0dc-c16ac59ae55d.filesusr.com/ugd/ecb701_b2792869d71d43f0a66cb2117eb90c97.pdf?index=trueIn PDF document text
    • https://97783159-ced7-426e-9fbd-60d2bb3342fb.filesusr.com/ugd/00058f_6a6ff9c6cab940b29fdcb679f033698b.pdf?index=trueIn PDF document text
    • https://2e9d2e4a-15d5-4529-8b29-235aceea4e08.filesusr.com/ugd/cac96f_c7e300affed34f59b9176fb9a279cb33.pdf?index=trueIn PDF document text
    • http://liwosajew.rf.gd/4500650366.pdfIn PDF document text
    • https://123949be-7110-4ba3-a240-a7df06fb38ce.filesusr.com/ugd/80fd5d_87607c6d5f6f4bacb23268a2aaa33535.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00018c55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18C55 5500 bytes
SHA-256: 6a430bf40626688b5ae1b3a6264dd9126225d00c30fd4ce17d5f1cacde2de4a2
font_01_sfnt_off00019f1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19F1B 1800 bytes
SHA-256: a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620
font_02_sfnt_off0001a7a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A7A8 10880 bytes
SHA-256: 98281e756ab21e7827e18386703e28b8f98c526e8252acd83aa1fb761164df78
font_03_sfnt_off0001cd20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CD20 16312 bytes
SHA-256: 975089639afea594160f6daa1ae948ffc4125994d61a9fd32dce02580f7b6b15