Malicious PDF — malware analysis report

Static analysis result for SHA-256 30aea61a8ce03822…

MALICIOUS

PDF

79.2 KB Created: 2021-03-17 14:23:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 497c189d53b01d902b578d6fdcc3611b SHA-1: 1629c0c3dda470273ab8576a149237a89724b6ab SHA-256: 30aea61a8ce03822db0d4798aea56db937118c19e6989d0da69dfa7a80104dda
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9994

Heuristics 5

  • 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.
  • 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://jumiwimov.ru/strik?utm_term=resumen+el+caballero+de+la+armadura+oxidada+resumen PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4414332/normal_604ab9994254c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380090/normal_5fd225ecdb244.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388178/normal_5ff6d111e073b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451737/normal_60047d42434ac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445532/normal_6023fd559ece2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489844/normal_5fce2466da876.pdfIn PDF document text
    • http://sedowogefinolew.iblogger.org/post_interview_candidate_evaluation_form.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501777/normal_5fc9959357011.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367268/normal_5ff283f8943fd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478148/normal_5ff3b0c63d169.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wujapu/goat_simulator_free_online_demo.pdfIn PDF document text
    • https://s3.amazonaws.com/selivuvumepaveb/singer_2018_episode_10.pdfIn PDF document text
    • http://gafevudivexer.rf.gd/collaborators_and_other_affiliations_information_template.pdfIn PDF document text
    • https://s3.amazonaws.com/lolijexejomak/penakatiramisotozidotite.pdfIn PDF document text
    • http://mulirogikek.epizy.com/spring_boot_microservices_with_docker.pdfIn PDF document text
    • https://s3.amazonaws.com/fajeloninesitel/43898486898.pdfIn PDF document text
    • http://bujavajivedejin.rf.gd/analysis_of_cations_and_anions.pdfIn PDF document text
    • https://s3.amazonaws.com/bomifabipi/rokez.pdfIn PDF document text
    • https://ec75ba9f-29a7-4b73-bb51-4c951d20089f.filesusr.com/ugd/17cde0_ea84f32b3c9d4359a56733a9d5096471.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jukoxisojow/lodutularomaxebali.pdfIn PDF document text
    • https://6d23287f-a15b-43b7-8d69-700c0e01f504.filesusr.com/ugd/185c00_bf78bfcb2cbc4249b0fe16c41444b490.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/figidireki/75077699356.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxalowafokuvo/adhyatma_ramayana_in_kannada.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_off0000f8b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8B8 5300 bytes
SHA-256: 281d5460ea182a2f517acdfe158625458db00c6b7081df6b5588ca333e76dd5e
font_01_sfnt_off00010aa7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AA7 11044 bytes
SHA-256: 76c8faee48d36cc617cd0862e1fc8a2b9747086be5e1b953c26b9557d77ba5a8

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