Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3afdea1f6ced5b7…

MALICIOUS

PDF

113.7 KB Created: 2021-04-20 04:11:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: aa01a3e86af8fe07de607028bcbee562 SHA-1: 9546bcfc8acc5c5162b23f210b55634606bca34d SHA-256: a3afdea1f6ced5b7239292e467f05dc855c278221d7d3fd69b652f2044354b18
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which are hosted on disposable domains or link farms, indicating a malicious intent to redirect users. The ClamAV detection and ML classifier strongly suggest this is a phishing or malware distribution attempt. No scripts were extracted, but the embedded URLs are the primary indicators of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://golowaki.ru/strik?utm_term=manual+terapia+cognitivo+conductual+pdf PDF link annotation
    • https://tunuwadubozowe.weebly.com/uploads/1/3/4/3/134363043/1005731.pdfIn PDF document text
    • http://vowujebotoza.mywebcommunity.org/tetowaronus.pdfIn PDF document text
    • https://duvutotan.weebly.com/uploads/1/3/0/7/130775700/8c102.pdfIn PDF document text
    • https://biwakegexenulu.weebly.com/uploads/1/3/4/4/134437141/fafabadopi_rapede.pdfIn PDF document text
    • https://zajewovebuvi.weebly.com/uploads/1/3/0/7/130739158/1745607.pdfIn PDF document text
    • https://tezulitu.weebly.com/uploads/1/3/4/3/134316961/manunilutamaxos.pdfIn PDF document text
    • https://xiruzukigipimog.weebly.com/uploads/1/3/4/8/134865515/cd46d99345436.pdfIn PDF document text
    • https://povilaromegew.weebly.com/uploads/1/3/4/4/134486615/555e14c7fb5.pdfIn PDF document text
    • http://janafan.scienceontheweb.net/aditivos_alimentarios_libro.pdfIn PDF document text
    • https://sijalafad.weebly.com/uploads/1/3/4/8/134887162/pagarojukoti_fagabube.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://0f285ee0-1b14-49a2-8a3e-060a2db94812.filesusr.com/ugd/4bf67f_6922d7f587d343ceb2773a8383a834ef.pdf?index=trueIn PDF document text
    • https://89f68ddc-9f98-4e60-8afa-3e0ca6603e9e.filesusr.com/ugd/4725f1_1c3fd305b6814d0291c76337661a04a2.pdf?index=trueIn PDF document text
    • http://bokawevetejap.atwebpages.com/rental_agreement_format_in_tamil.pdfIn PDF document text
    • https://ed21222e-fee3-4fab-8b52-e2ddb7bb35ab.filesusr.com/ugd/e73fea_9103f1bbbb7547a7a1a5d681d5183787.pdf?index=trueIn PDF document text
    • https://7ffe38df-ef78-47a1-8632-a9c579db478a.filesusr.com/ugd/8ff694_504f6b7860324245a7c0bef03f76a896.pdf?index=trueIn PDF document text
    • https://181f3bdf-810f-4c34-abb3-9f3362228cd6.filesusr.com/ugd/30415f_37e152666150429c9f3b3163bf9f5592.pdf?index=trueIn PDF document text
    • https://0cfe495c-9a5f-46a1-a5f3-fb21b6211bac.filesusr.com/ugd/7aabb2_058877d2f5bc489093ce478e81e44ff7.pdf?index=trueIn PDF document text
    • http://piwakitidi.onlinewebshop.net/48070196696.pdfIn PDF document text
    • https://80b1f93a-fe74-4439-a81d-34814fa7a505.filesusr.com/ugd/e56fe2_01939e5d000b47969b0ad68a31aad407.pdf?index=trueIn PDF document text
    • https://6363ce23-9394-4102-a476-7be320345719.filesusr.com/ugd/7c41c1_17e43711a4bd43869831213c15853cb2.pdf?index=trueIn PDF document text
    • https://6e678f60-abc6-404c-883a-cd1729fdffee.filesusr.com/ugd/e4291f_13220b1428584af4901e6ccc5eb86f02.pdf?index=trueIn PDF document text
    • http://susabumo.atwebpages.com/42715303543.pdfIn PDF document text
    • https://5366dd3f-28a3-4342-b8e5-5bed86455aec.filesusr.com/ugd/a92322_1a9fc2ccfb354f83a99c88ad4df30d64.pdf?index=trueIn PDF document text
    • https://f98f40d2-b649-4e6b-99af-b89bbf2331ff.filesusr.com/ugd/724bd4_6238e8c034454ef2b86a0c0f0d65b4cf.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_off00017a9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17A9E 5208 bytes
SHA-256: c69810eea6b931bfe82617be7b06cabb16a9664ebdf721ad4d1e456cc82b2ccb
font_01_sfnt_off00018c7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18C7C 13496 bytes
SHA-256: 4de0bb2b87886763ca82743875b3d90ac804c4cfa4d8879dca080ed72aaef7b8

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