Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc016e289796a25a…

MALICIOUS

PDF

85.3 KB Created: 2021-03-22 21:53:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 41ad9e0b28c1207cf7a214cd0c808bac SHA-1: 941458dbaf1ea323c28d3970690422de46f83f43 SHA-256: cc016e289796a25acd711d7022b0c4d7fa18684cbdcc2599a1f64e60fb9d2f09
194 Risk Score

Malware Insights

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

This PDF file was identified as malicious by a ClamAV detection and an ML classifier. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to potentially harmful content. The document body, though heavily obfuscated, contains references to 'wkhtmltopdf' and a lure for 'geometry dash apk ios gratis', indicating a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 7

  • 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.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://pelibifir.ru/wix?keyword=geometry+dash+apk+ios+gratis PDF link annotation
    • http://lnstagramverifiedbadgeshelpcenters.net/doena_de_chagas_formas_de_prevenoff5xm.pdfIn PDF document text
    • https://cdn.sqhk.co/tikugosedik/fiejjii/xebumaxusileniw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495999/normal_6010882308392.pdfIn PDF document text
    • https://kilobabax.weebly.com/uploads/1/3/1/8/131856311/a9029f878a.pdfIn PDF document text
    • https://cdn.sqhk.co/lewivapawo/hj1iigf/koludo.pdfIn PDF document text
    • https://vopevejefed.weebly.com/uploads/1/3/1/6/131606133/5f38bb7a76.pdfIn PDF document text
    • https://lanudoda.weebly.com/uploads/1/3/2/3/132303217/805551d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481067/normal_603053b343a3c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493221/normal_601739ed48d10.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413701/normal_603b4b4cdf92f.pdfIn PDF document text
    • https://cdn.sqhk.co/rivogigaweb/phbMheU/34871743368.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445869/normal_603c1bbb8f561.pdfIn PDF document text
    • https://ludatigesoz.weebly.com/uploads/1/3/6/0/136050408/6732243.pdfIn PDF document text
    • http://songkfrk.site/308931376254ue2n.pdfIn PDF document text
    • https://dawemewi.weebly.com/uploads/1/3/4/7/134747996/rivol.pdfIn PDF document text
    • https://jubipolofolexi.weebly.com/uploads/1/3/2/3/132302872/metamal.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473656/normal_601b8fe334fff.pdfIn PDF document text
    • https://cdn.sqhk.co/xobupiba/aidVhii/rekugopovoz.pdfIn PDF document text
    • https://bituxusod.weebly.com/uploads/1/3/4/3/134347303/xuparewoveg.pdfIn PDF document text
    • https://cdn.sqhk.co/jebavimot/jggjigi/fnaf_fan_games_android_port.pdfIn PDF document text
    • https://woduluzotuni.weebly.com/uploads/1/3/4/3/134373450/zirasipitimoxur.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417814/normal_5ffdece211e4c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB35 5540 bytes
SHA-256: d385e6bb4c33b047070649c2c4b2542a52582d567fd97f1dbebf54d80c5e710a
font_01_sfnt_off0000fde9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDE9 23052 bytes
SHA-256: 300c590069933c26e6fc667fec29aaaff0d761652200b2b6cdce43ee6e6a2b44
font_02_sfnt_off00013254.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13254 16076 bytes
SHA-256: fce21d86c2b5faa43a5619d6c859002d414ef8720c10ef6ba746f045f1b0bfa7