Malicious PDF — malware analysis report

Static analysis result for SHA-256 f87f5ccd04f13f50…

MALICIOUS

PDF

87.4 KB Created: 2021-03-08 00:43:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: b6ed5269e1c21a92c05b2aac49d40db3 SHA-1: 201a99e6528365b61548954d2333d14406e91783 SHA-256: f87f5ccd04f13f50503e41fe0983da827a4f477e0c95bfe6dfcfe97acdc26dbc
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing or trojan. It contains numerous embedded URLs, many of which point to disposable domains and are structured as link farms, suggesting a phishing or redirection attempt. The document body, though heavily obfuscated, contains keywords like 'Thinkorswim fees penny stocks' which are likely used as lures to attract users interested in financial trading.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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://resalured.ru/123?utm_term=thinkorswim+fees+penny+stocks PDF link annotation
    • http://passive-income.ru/pilewebewezujutewu6z40v.pdfIn PDF document text
    • http://fanisore.sportsontheweb.net/84431351276.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495694/normal_5fe6edd2f36af.pdfIn PDF document text
    • http://artemk.ru/electron_configuration_worksheet_cheuk733.pdfIn PDF document text
    • https://s3.amazonaws.com/rebesudanolo/25398515132.pdfIn PDF document text
    • https://cdn.sqhk.co/bexuxoxabim/cy9BIhb/alley_bubble_tea_delivery_singapore.pdfIn PDF document text
    • http://duzusedolatepe.mypressonline.com/chartered_financial_analyst_program_cfa_in_india.pdfIn PDF document text
    • https://cdn.sqhk.co/kitijorawul/zhjCjcj/300_battle_glamorous_heroes_apkpure.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470017/normal_5fdc5d3f96e1d.pdfIn PDF document text
    • https://cdn.sqhk.co/kuruwoke/ibgge2i/38559031968.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427284/normal_5fe1525c85834.pdfIn PDF document text
    • https://s3.amazonaws.com/wiwuxot/puvikufaxevoxu.pdfIn PDF document text
    • https://cdn.sqhk.co/jabosuve/bhcha9P/yeezy_boost_350_v2_black_reflective.pdfIn PDF document text
    • https://s3.amazonaws.com/rubidokezive/32946426719.pdfIn PDF document text
    • https://s3.amazonaws.com/mubemutolewe/8822865020.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369494/normal_60449b5417787.pdfIn PDF document text
    • http://rukozhop-guide.com/geometric_and_arithmetic_sequence_worksheetvd6w5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366354/normal_5fd63954b85ce.pdfIn PDF document text
    • http://midarujiwuvi.mygamesonline.org/75645618386.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491451/normal_5fc68e4c55486.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nununad.myartsonline.com/what_are_the_small_indentations_on_a_golf_ball_called.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_off00011845.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11845 5220 bytes
SHA-256: 0aaad630353989f50f24493efb30a87c5f11192d90f22363c5b1752515b51db3
font_01_sfnt_off000129fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129FC 11212 bytes
SHA-256: 7e2695bbe65c334b92d909b374a084317d0be967ab472ba7be0841baef8b19e6

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