Malicious PDF — malware analysis report

Static analysis result for SHA-256 86c5afd33ce86458…

MALICIOUS

PDF

73.6 KB Created: 2021-02-28 03:57:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 31b525f5329689568c2038932ad5b5f3 SHA-1: 86fafd19bb71a244ee62a6bbc17f19e88b534bb7 SHA-256: 86c5afd33ce864582a10a403428e493a29313d46f9993f3e546d0485fb86633d
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 0.9998

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://jottigo.ru/aws?utm_term=delonghi+heater+safe+heat PDF link annotation
    • https://zulevoto.weebly.com/uploads/1/3/2/6/132696122/d685942e8c.pdfIn PDF document text
    • https://mututekabifu.weebly.com/uploads/1/3/4/4/134466573/kodugisegave.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448547/normal_600bef965927a.pdfIn PDF document text
    • http://nesebonuvobeju.getenjoyment.net/56906436652.pdfIn PDF document text
    • https://cdn.sqhk.co/vefapatape/btigchb/mimpi_basah_ketika_puasa_malaysia.pdfIn PDF document text
    • http://nejevefivi.mypressonline.com/planet_fitness_sign_up_fee_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/kewexezaviz/Bhejcut/fruit_splash_math.pdfIn PDF document text
    • https://kixifosesezor.weebly.com/uploads/1/3/3/9/133998007/4903441.pdfIn PDF document text
    • https://gawofatofuwe.weebly.com/uploads/1/3/1/3/131380275/fofanigefibaduzugu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wugujub.onlinewebshop.net/fibijinurulimed.pdfIn PDF document text
    • http://kavibajegis.onlinewebshop.net/the_lottery_by_shirley_jackson_short_summary.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e572.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE572 5028 bytes
SHA-256: 40707476620f46e807c4865a836d4c0535d15084d0da24ae75785e13283068ad
font_01_sfnt_off0000f68c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF68C 10352 bytes
SHA-256: 2470d30a21836db529273def08c286674122a7ec6cc6b8b4b9cc598157d60222

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