Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f3f5d4f5aba3e7a…

MALICIOUS

PDF

77.8 KB Created: 2021-03-11 13:55:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 00d5a089d4de779426230b372ae22136 SHA-1: 57eb695ac3c514f632e0f88f112c1bb7c6ada3fb SHA-256: 7f3f5d4f5aba3e7a7a4088a2e4bac47b6b8db2a93a829432fac385ef42873d71
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9988

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 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://crophysi.ru/123?utm_term=applicability+of+gst+audit+report PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4484122/normal_6037d59d92311.pdfIn PDF document text
    • https://cdn.sqhk.co/murerezusa/HhbEhcW/30168785162.pdfIn PDF document text
    • http://bumasujofoj.getenjoyment.net/pathoma_2018_google_drive.pdfIn PDF document text
    • http://tifusavegapawuf.mygamesonline.org/60598747527.pdfIn PDF document text
    • http://serururepus.scienceontheweb.net/17503716413.pdfIn PDF document text
    • https://cdn.sqhk.co/gepumenujeme/WhiiJeI/pastimes_bar_and_grill_ripon_wi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383703/normal_5fe4127770fe7.pdfIn PDF document text
    • http://xuzerujagojagip.scienceontheweb.net/ford_mustang_shelby_gt500_price_in_south_africa.pdfIn PDF document text
    • http://kiritisivasol.mywebcommunity.org/xomuwofelefamulutuv.pdfIn PDF document text
    • http://mokemowowove.mygamesonline.org/what_lights_on_dashboard_mean.pdfIn PDF document text
    • https://cdn.sqhk.co/wavagowew/DRzbjeC/puwagoxawi.pdfIn PDF document text
    • http://vubitim.sportsontheweb.net/35315026252.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451229/normal_5fceb52da8f81.pdfIn PDF document text
    • http://jekeluxuto.mywebcommunity.org/12372727902.pdfIn PDF document text
    • http://koponegigat.medianewsonline.com/43505916192.pdfIn PDF document text
    • https://cdn.sqhk.co/jumifokujuje/jiEiekH/6290101503.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373004/normal_5fd9cd50ae2ca.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451230/normal_5febb39a1a504.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://uploads.strikinglycdn.com/files/a9239924-c6b4-4d8d-9cbd-6843b6996ac9/32151987411.pdfIn PDF document text
    • http://tiwatimab.atwebpages.com/panasonic_es8243a_arc4_electric_razor_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fcf5db26-5698-4d24-8418-dbbffbb20e29/15678578744.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f056121-e002-4371-bf08-824dc555569e/para_que_sirve_el_jengibre_con_canela_y_laurel.pdfIn PDF document text
    • http://peledopa.myartsonline.com/audre_lorde_poems_power.pdfIn PDF document text
    • http://vidugozu.atwebpages.com/definition_of_history_by_historians.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_off0000e6ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6CA 5328 bytes
SHA-256: 3b7ec77d9f4bf684f83493f4f76d967b853e7bd05d8aa8aa2ae4f553c8dae07f
font_01_sfnt_off0000f8fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8FB 9968 bytes
SHA-256: 24e1731bce5e9aa340cfa243a3020bb768f7371f5b54e2fa730c1b10c5fd1ed6
font_02_sfnt_off00011b1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B1F 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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