Malicious PDF — malware analysis report

Static analysis result for SHA-256 adc0598b834b649a…

MALICIOUS

PDF

73.2 KB Created: 2021-03-17 20:33:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 5cbb828bf74318a6130f85aac8347ba7 SHA-1: 5a47d41a79c4d9e6f4ad3fe88a0730136fceb82a SHA-256: adc0598b834b649a92519b68ba238b1bd597df15f176b84810625f8217990318
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 0.9996

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://kuzutuzo.ru/strik?utm_term=sunquest+pro+24rs+reviews PDF link annotation
    • http://yoptan.space/jane_eyre_penguin_readers_level_5jskxr.pdfIn PDF document text
    • https://cdn.sqhk.co/motulobugaji/ieUnSii/xatisobovuwotufe.pdfIn PDF document text
    • http://vehicleusains.com/donupukizupesidewadibevx2.pdfIn PDF document text
    • http://fukazab.mywebcommunity.org/3880972937.pdfIn PDF document text
    • https://kixixowagixu.weebly.com/uploads/1/3/2/7/132710794/2122493.pdfIn PDF document text
    • http://draiwenstore.online/the_entertainer_lyrics_the_sting5fi6w.pdfIn PDF document text
    • https://ledapenilodaro.weebly.com/uploads/1/3/1/0/131070651/rorositusaj-gumomevezi-midekilu-ganafogoleweg.pdfIn PDF document text
    • http://bewewafip.scienceontheweb.net/33292339240.pdfIn PDF document text
    • https://cdn.sqhk.co/bidomutarili/dLRfggz/clockwork_model_of_the_solar_system_named_after.pdfIn PDF document text
    • http://fredo.bike/avast_antivirus_free_offline_setup_201623lwk.pdfIn PDF document text
    • https://pirebuvix.weebly.com/uploads/1/3/2/7/132710697/e265c0c13c7.pdfIn PDF document text
    • https://cdn.sqhk.co/tokebamojos/uCbzmha/age_of_empires_2_android_portugues.pdfIn PDF document text
    • https://cdn.sqhk.co/pigevikuwi/ahjjcjj/xunusapafezupa.pdfIn PDF document text
    • http://tryse.xyz/voluzujagamoxekago8dz5n.pdfIn PDF document text
    • https://duzunadi.weebly.com/uploads/1/3/0/9/130969775/df9f689024.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/jupudizadid/61382721022.pdfIn PDF document text
    • https://s3.amazonaws.com/banula/how_to_turn_on_bluetooth_on_smart_wristband.pdfIn PDF document text
    • https://s3.amazonaws.com/kulinisokakewi/kibulunegonanewerivow.pdfIn PDF document text
    • https://s3.amazonaws.com/wobuzisibal/53826900376.pdfIn PDF document text
    • https://s3.amazonaws.com/rekorewexidiwo/why_is_my_lg_gas_dryer_not_heating_up.pdfIn PDF document text
    • http://fiforeru.atwebpages.com/85563572065.pdfIn PDF document text
    • https://s3.amazonaws.com/figugipopar/469976215.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_off0000dec9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEC9 5172 bytes
SHA-256: 46df7eea9583d3f02bdfeb35ccb4de1b5f6034a7c846c31fce19295cec9eb520
font_01_sfnt_off0000f096.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF096 11044 bytes
SHA-256: e5d4b5d8099d5c8f00765ed10da27604a20ecdf3e6cb7bc7dbe56118a1edfbee

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