Malicious PDF — malware analysis report

Static analysis result for SHA-256 525872e1625094b9…

MALICIOUS

PDF

84.6 KB Created: 2021-03-22 21:04:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 82905e0444f8a7a600e95ede81965427 SHA-1: 616e5da5ff310c894d1048a1024b54f631fb87de SHA-256: 525872e1625094b946533a56eacfcedb768c85d7647d11a883c37d9ce084b11d
154 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a common tactic for phishing or SEO spam campaigns. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and embedded URI heuristics suggest it's designed to redirect users to malicious or spam-related websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8622

Heuristics 4

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://ponafet.ru/aws?utm_term=starfinder+near+space+pdf+free
    • https://wuzovogupo.weebly.com/uploads/1/3/4/7/134720757/bbedb97c.pdf
    • https://tilawifi.weebly.com/uploads/1/3/4/4/134480999/busulepelixewe.pdf
    • https://jufesuzukexo.weebly.com/uploads/1/3/5/2/135294717/6eff1dd4b53e.pdf
    • http://leafester.online/when_can_you_plant_tomatoes_in_south_floridajrr1g.pdf
    • http://legendnat.space/wifomoxananigur0c.pdf
    • https://xuvuvigaxopezut.weebly.com/uploads/1/3/4/7/134721928/7576411.pdf
    • https://kumobavubisu.weebly.com/uploads/1/3/0/7/130775432/8899899.pdf
    • https://vizegibog.weebly.com/uploads/1/3/4/4/134458583/3942357.pdf
    • http://fajiriduxir.medianewsonline.com/hiv_and_aids_symptoms.pdf
    • https://zekisotirateme.weebly.com/uploads/1/3/4/3/134368555/4317c39.pdf
    • https://gojenegitoz.weebly.com/uploads/1/3/4/3/134387591/4272109.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://e2604e0b-f95a-4acb-b53f-a7db3827b2a1.filesusr.com/ugd/225520_934015b9cd324655a68a531087225936.pdf?index=true
    • https://uploads.strikinglycdn.com/files/7298202a-dee6-4ec0-9735-6965668f24de/verbal_reasoning_test_questions_and_answers.pdf
    • https://uploads.strikinglycdn.com/files/31b9e0d2-bc34-4251-a7fc-dbfde21f4eef/kaplan_mcat_complete_7-book_subject_review.pdf
    • https://27a83426-c768-4525-a63d-b5b732cca755.filesusr.com/ugd/28b3f7_983dfcec59204e92a43905843d6947e8.pdf?index=true
    • http://poborunedajemo.onlinewebshop.net/nixizerovigojufa.pdf
    • https://18b62485-dce0-4e35-9712-b1d1f13fcb23.filesusr.com/ugd/296484_9c274ef5ab6f46ad9bb2159aa32b767b.pdf?index=true
    • https://uploads.strikinglycdn.com/files/e1a98050-197e-4809-a1cc-61392d8f1ce1/rainbow_fish_coloring_page.pdf
    • https://8f20b4bd-83f7-4a55-8c6f-e9501e2e061c.filesusr.com/ugd/c1c462_575de835066e46c9b00a7aecb5fe211c.pdf?index=true
    • https://uploads.strikinglycdn.com/files/fdc4517b-bf81-428b-8208-553169e633e9/how_do_you_fix_a_septic_drain_field.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011fad.bin
1f66a08a8044b35e97b1d3fd4ca412ea2d1585b3b9e0574cc090acfa97f04b9d
pdf-font-stream PDF embedded font (sfnt) at offset 0x11FAD 5220 bytes
font_01_sfnt_off0001317f.bin
2d406e0a6df552ccf50ae418bb769b5890407d8256ca0a2550d5d367f20ef51d
pdf-font-stream PDF embedded font (sfnt) at offset 0x1317F 11688 bytes