Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b09b389d85d16c6…

MALICIOUS

PDF

100.1 KB Created: 2021-05-02 11:04:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 0d4698b827082835112d1e89af592f7e SHA-1: c7271130bb43f7539cd4a86671e84be84f2876d6 SHA-256: 1b09b389d85d16c6a165287724761955e4463bbfe5e199ac3b541241178f7b64
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 0.9995

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://midufefew.ru/strik?utm_term=fender+mustang+2+manual PDF link annotation
    • https://patewowuxafopon.weebly.com/uploads/1/3/4/5/134595548/pujiwidixegilidome.pdfIn PDF document text
    • http://rebibedo.mywebcommunity.org/wiviwobuv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388827/normal_602269a900bc9.pdfIn PDF document text
    • http://datiwufirul.medianewsonline.com/sikukirizusadadewebiwuzor.pdfIn PDF document text
    • http://rivafigikiwax.medianewsonline.com/20407278338.pdfIn PDF document text
    • http://pivolirarorip.mypressonline.com/mean_median_mode_examples.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369191/normal_602b4e217993a.pdfIn PDF document text
    • http://gefokugok.getenjoyment.net/rurabagowegulifat.pdfIn PDF document text
    • https://labifunuvi.weebly.com/uploads/1/3/4/8/134847398/49ed3da2dff.pdfIn PDF document text
    • https://tadivibudup.weebly.com/uploads/1/3/4/8/134899420/kumonum-rotomejila.pdfIn PDF document text
    • http://nogurufegu.mygamesonline.org/costing_and_estimation.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bidejepeko.onlinewebshop.net/what_are_five_characteristics_of_a_healthy_relationship.pdfIn PDF document text
    • https://20128683-61eb-4207-b985-d468b1a81fea.filesusr.com/ugd/0049ca_9f57e5afde544a42b15cd771415fe8ae.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sezebepit/5314597972.pdfIn PDF document text
    • https://s3.amazonaws.com/limepusotanal/sabubejudemabas.pdfIn PDF document text
    • https://s3.amazonaws.com/zesixefe/vosigazerexewovojanetat.pdfIn PDF document text
    • https://161abad2-7de2-49bb-9904-d6e2a620a662.filesusr.com/ugd/2eec94_2e8e0eb0c7bc4ffeabe99d4054651c3d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/luxaduzimase/2480104554.pdfIn PDF document text
    • http://vasakuzepilaxi.onlinewebshop.net/java_programming_aptitude_questions_and_answers.pdfIn PDF document text
    • https://e61e9f85-32c5-4861-9fd4-b89109084c35.filesusr.com/ugd/2e4eb4_76c132fb4a5141b3bd77d7a8a53c1da8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zusevamasor/jurnal_akuntansi_pemerintahan_daerah.pdfIn PDF document text
    • https://cdb53ace-3f3f-41e1-823e-0ecf3add8ba2.filesusr.com/ugd/47e9e0_19c1749ab3a04d2aa14c6658e617faf7.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014912.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14912 5232 bytes
SHA-256: 6ce2193bf37332f9863546fd0e0e870b0d61adc0dd23f82066a700d2dda47e29
font_01_sfnt_off00015ac6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15AC6 11800 bytes
SHA-256: 525c0feaf053691cff9d876e3d2fed5abdeddcf9fff27fa8d3abc6488104893f

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