Malicious PDF — malware analysis report

Static analysis result for SHA-256 902bd62520a7ce55…

MALICIOUS

PDF

79.7 KB Created: 2021-03-20 08:29:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 3c9fa2b9651215e29d5f2d9b05ffb7e1 SHA-1: 8e58ff2c708eee306f264a48f243ae267b38352b SHA-256: 902bd62520a7ce55197f4bb6facad6783cce92e16935de2337ff0d1edb8c9332
126 Risk Score

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 0.9997

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://jacksth.ru/123?utm_term=rimedio+contro+formiche+in+casa PDF link annotation
    • http://joy-todays.online/2939505241541m82.pdfIn PDF document text
    • http://sexutumuze.22web.org/zadilazazakefebaripinawep.pdfIn PDF document text
    • https://cdn.sqhk.co/dazibewibu/hhhcggg/super_iron_rope_hero_fighting_gangster_crime.pdfIn PDF document text
    • http://italiahot.fun/tulubulirariyoo29.pdfIn PDF document text
    • http://gemajelibetojup.scienceontheweb.net/photoshop_manipulation_tutorials_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/vixemujomu/3Hhjvhd/46907413170.pdfIn PDF document text
    • https://cdn.sqhk.co/rifojimuna/jaha5bB/stock_market_simulator_calculator.pdfIn PDF document text
    • https://cdn.sqhk.co/tejilunuf/Xhetnhd/zidodekukekap.pdfIn PDF document text
    • http://mazers.fun/m-audio_axiom_25_manualanrqb.pdfIn PDF document text
    • https://cdn.sqhk.co/lifudidu/ba7jfgg/gosofugutumi.pdfIn PDF document text
    • http://wiwajekirutiw.scienceontheweb.net/69639384367.pdfIn PDF document text
    • http://jidokove.scienceontheweb.net/mimesis_auerbach_polski.pdfIn PDF document text
    • http://megantv.site/vapobomigofezabovokjov.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/lowuwofuxali/esc_guidelines_non_st_elevation_myocardial_infarction.pdfIn PDF document text
    • http://muluwokixo.onlinewebshop.net/zaxabeb.pdfIn PDF document text
    • https://7ec9ed57-df89-401a-953b-45744c150cee.filesusr.com/ugd/6e3131_b95e7d5dc6934d8ba356c49d26eb56c8.pdf?index=trueIn PDF document text
    • https://fc060a1e-8c1d-4b7d-bafd-75f79d4c6355.filesusr.com/ugd/c0a468_8f6122dbf9c3471a81bd1b2ed1d81c64.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tikoweravisixu/91381087838.pdfIn PDF document text
    • https://s3.amazonaws.com/dazutun/konudukodeloligomiwuwe.pdfIn PDF document text
    • http://naditoliwinudev.epizy.com/driver_vehicle_inspection_report_app.pdfIn PDF document text
    • http://tofalit.myartsonline.com/chicago_blackhawks_2020_schedule.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_off0000f814.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF814 5236 bytes
SHA-256: 39fd5476a992067e7204457665a91293c5164c83110c7fba9d091ecd14b98e1f
font_01_sfnt_off000109be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109BE 11724 bytes
SHA-256: be7c6bb1fdc9a39a826d1004841aa819d3b810ae5e1b00e103ba73b3b8a025a5

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