Malicious PDF — malware analysis report

Static analysis result for SHA-256 e89f055e670db0b3…

MALICIOUS

PDF

98.4 KB Created: 2021-03-24 08:14:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: be305562bfd702dfe2bcc9356f2fa6eb SHA-1: 5a51ce41e9d606c84be85e254084e22c8213684c SHA-256: e89f055e670db0b31957184f4d65424707b2cfc45d284d7cf83e647dee86ffca
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO spam operation. The presence of a ClamAV detection for 'Pdf.Phishing.Trojan' and ML classification strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous URLs point towards a phishing or malicious redirection scheme, likely intended to deliver further malware or lead users to fraudulent sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • 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.
  • 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://botokaw.ru/123?utm_term=bullguard+antivirus+free++filehippo PDF link annotation
    • http://zagozogenef.sportsontheweb.net/38425851528.pdfIn PDF document text
    • https://cdn.sqhk.co/zugivakizo/d7jgjcR/tornado_siren_sound_effect_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/rakuvonume/ies4hdU/26034112743.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415544/normal_5fc8e2c5c4b26.pdfIn PDF document text
    • https://cdn.sqhk.co/fatobaliv/ajgqmje/68898697196.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424011/normal_5fe62a9c8b07a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425501/normal_601021f869712.pdfIn PDF document text
    • https://cdn.sqhk.co/nizivatitogu/iViejgX/xuboto.pdfIn PDF document text
    • http://tazizinujumijoj.mywebcommunity.org/37073144739.pdfIn PDF document text
    • https://nelixifejesuvol.weebly.com/uploads/1/3/1/4/131406681/19552.pdfIn PDF document text
    • https://cdn.sqhk.co/xipitufekaru/ezhe83i/alien_area_51m_r2.pdfIn PDF document text
    • https://musibagufes.weebly.com/uploads/1/3/4/5/134587398/mujefinem-gugamoj-sulurekovimel-nobuba.pdfIn PDF document text
    • https://mavabebuvaxar.weebly.com/uploads/1/3/0/8/130814237/xoputug-jesifevupasazap-texuwa-gekog.pdfIn PDF document text
    • https://cdn.sqhk.co/zikegasenar/gfGzC2B/draw_it_too_batman_arkham_knight.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419857/normal_5fee95c632e33.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421776/normal_5ff91ff5b10c9.pdfIn PDF document text
    • https://cdn.sqhk.co/leloxoreje/Tggj0jd/best_light_meter_app_for_iphone_5s.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://desovizipelo.onlinewebshop.net/asma_cardiaco.pdfIn PDF document text
    • https://1c8fadd7-09eb-4d2b-9d42-8e747ba5ce52.filesusr.com/ugd/60625b_93ebc388c95f4608bc94decfee813c30.pdf?index=trueIn PDF document text
    • https://4b4b92a8-4ac5-4030-97d5-af0917f8c077.filesusr.com/ugd/0251f0_6a94ed8dc6c3449cab366b8cca070fa2.pdf?index=trueIn PDF document text
    • http://rodedewezijore.atwebpages.com/4_principles_of_scientific_management_by_frederick_taylor.pdfIn PDF document text
    • https://204833c8-abda-4421-8777-5048ee7dd919.filesusr.com/ugd/e30b7a_180b3693f8a84daab4a6cab3b4929488.pdf?index=trueIn PDF document text
    • http://gixopiv.onlinewebshop.net/how_can_i_get_rosetta_stone_for_free.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000144cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x144CD 5412 bytes
SHA-256: 272fdce1493d89fbacd6ba89cc81f4f99459adf336f731f60cf4576404cb9066
font_01_sfnt_off0001573a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1573A 10904 bytes
SHA-256: 7c999f23a366104655395100d42c2f781baeebbd09e5b7a71895f41d3dd97903