Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a9da59407f31d1a…

MALICIOUS

PDF

74.2 KB Created: 2021-03-15 00:57:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 9e76338f3f72a95ccc0849051547d808 SHA-1: a6e397732a66c59287aab177af3b33d8fd52de46 SHA-256: 8a9da59407f31d1ac3365c06a4984315296ec88af06ac3f97b1a503f241abfd8
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many hosted on disposable domains, indicative of a link farm or SEO manipulation tactic. ClamAV and ML classifiers identified the file as malicious, specifically a phishing trojan. The presence of embedded URLs and the overall structure suggest an attempt to redirect users to potentially malicious content or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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/wix?keyword=simpson+maker+unblocked PDF link annotation
    • http://disojunis.iblogger.org/busakibimopidisusevose.pdfIn PDF document text
    • https://wabezapodila.weebly.com/uploads/1/3/1/4/131437306/kadexeninowotibimut.pdfIn PDF document text
    • http://lajulufubugo.22web.org/60109982779.pdfIn PDF document text
    • https://xidoferowugefu.weebly.com/uploads/1/3/4/3/134348033/4535008.pdfIn PDF document text
    • https://fuxopejebema.weebly.com/uploads/1/3/4/0/134018858/6859179.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://boxajomako.epizy.com/xejimoxezogi.pdfIn PDF document text
    • http://ratotepuno.rf.gd/alien_vs_predator_mod_apk_revdl.pdfIn PDF document text
    • http://varoniwarovez.rf.gd/email_template_builder_npm.pdfIn PDF document text
    • https://7605d98d-8b17-4a41-9383-f5c8d5af9bcc.filesusr.com/ugd/2bed4c_0f7ed37abc194c9e89c080c73beff4aa.pdf?index=trueIn PDF document text
    • https://df6a9abb-74f3-47e1-b359-fe6d1019da36.filesusr.com/ugd/7921d2_2604bef02a084b24a2e42e8194403b62.pdf?index=trueIn PDF document text
    • https://13a7c488-548c-4b48-b567-d2b0b9a3e1de.filesusr.com/ugd/85d67f_22656295396549949440e6e5d87c14ec.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vukusa/sipibaraxovezatanowus.pdfIn PDF document text
    • https://40785fcd-1e5e-4316-9306-5db1d5795eae.filesusr.com/ugd/2f07a1_5f7198a756df46638d4a34a08240e00c.pdf?index=trueIn PDF document text
    • https://cf176ec6-4820-456b-adf9-61e5f06c968f.filesusr.com/ugd/43d598_6718675c3fdb438ca1f0dbeb27ac1bbc.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xurixado/53644316899.pdfIn PDF document text
    • https://acd80754-3b70-42c6-a60f-3489f6261da4.filesusr.com/ugd/f1780b_8e9d31f4cbc84c27ac617abaa72d05fd.pdf?index=trueIn PDF document text
    • http://fonezitugomal.rf.gd/safety_razor_kit_for_beginners.pdfIn PDF document text
    • http://zowisoburime.rf.gd/lixinopimedavobig.pdfIn PDF document text
    • https://711920be-b761-4f0e-a604-762b26663b16.filesusr.com/ugd/ffcbea_96c8209e07604f419caaeec05872621d.pdf?index=trueIn PDF document text
    • https://b1706aec-e9b1-4c6c-9a93-f14ef4a1c402.filesusr.com/ugd/3b47cb_3e4fa4fb3bb9402088828db84d1565ce.pdf?index=trueIn PDF document text
    • http://vaxalisuj.rf.gd/88388906277.pdfIn PDF document text
    • https://0e627107-309b-4451-a84d-e7064c41fccd.filesusr.com/ugd/04c368_04bfef01e89540a6a8bc75321de4d214.pdf?index=trueIn PDF document text
    • http://batubegirego.rf.gd/backbeat_fit_500_manual.pdfIn PDF document text
    • http://kuxetelib.epizy.com/tavivevon.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e54e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE54E 5528 bytes
SHA-256: ecefe5dcdda1a69d918f71e1896daf5f0459307777aed6851d5515538aaeefe5
font_01_sfnt_off0000f7f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7F3 10440 bytes
SHA-256: 3f1e3d252a572460016deaad277f117d7f107a61e8a6501749c4c4e7b2a47a70

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