Malicious PDF — malware analysis report

Static analysis result for SHA-256 9516fc1d4cbdd019…

MALICIOUS

PDF

79.7 KB Created: 2021-02-19 09:46:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 6b66529749ffbda03db2456002213fd5 SHA-1: 5b74920538c884a8f7c3c1aada691ac64e531a43 SHA-256: 9516fc1d4cbdd019acd85f559a471d2fb65f0df84e84e2be29be661c57d1c4a5
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a critical heuristic identifying it as a link farm. The embedded document body, though heavily obfuscated, contains a question about Bose speakers, suggesting a lure. The presence of multiple Weebly and sqhk.co domains hosting PDF files indicates a likely phishing or scam campaign aiming to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://druttle.ru/strik?utm_term=what+is+the+difference+between+bose+companion+5+and+50 PDF link annotation
    • https://cdn.sqhk.co/sufadoma/gjN7ifk/dibosepipigizajapaz.pdfIn PDF document text
    • https://limotesatax.weebly.com/uploads/1/3/1/8/131871768/c46d9a.pdfIn PDF document text
    • https://zuxibonidape.weebly.com/uploads/1/3/4/8/134889984/misusawasa.pdfIn PDF document text
    • https://sasasukaga.weebly.com/uploads/1/3/4/6/134624721/442589.pdfIn PDF document text
    • https://cdn.sqhk.co/gotuxixovumu/iHHYgiD/46464236838.pdfIn PDF document text
    • https://cdn.sqhk.co/romilononove/sibPibV/tobifoteme.pdfIn PDF document text
    • https://mivebomuponi.weebly.com/uploads/1/3/1/3/131398008/kolejup.pdfIn PDF document text
    • https://zojivevu.weebly.com/uploads/1/3/6/0/136090852/sunobebu.pdfIn PDF document text
    • https://cdn.sqhk.co/mudixeguda/tzpVifa/domet.pdfIn PDF document text
    • https://cdn.sqhk.co/mifijizudi/5bjgfjj/samsung_notes_app_templates.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/jezaxojipevu/blister_packing_machine_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/bufexa/critical_analysis_outline_template.pdfIn PDF document text
    • https://s3.amazonaws.com/xojafemori/30634040226.pdfIn PDF document text
    • https://s3.amazonaws.com/zuwosil/vedutogazupulozod.pdfIn PDF document text
    • https://s3.amazonaws.com/gateme/repaso_1b-_8_crossword_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/kotodur/remove_google_chrome_software_reporter_tool.pdfIn PDF document text
    • http://ronarag.epizy.com/lutulipipugikepiderawazes.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e917.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE917 5660 bytes
SHA-256: 5f7c9a9489a93b44ae070f04c087f310c0a5215449d03a347e1d1e02729b5cf6
font_01_sfnt_off0000fc39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC39 11488 bytes
SHA-256: 5277d4c0e55279c0b777946f430d2576f7881aa35ce3bbfb85bec44298ef491d
font_02_sfnt_off00012355.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12355 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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