Malicious PDF — malware analysis report

Static analysis result for SHA-256 8179ab458ae90b61…

MALICIOUS

PDF

83.6 KB Created: 2021-03-21 05:27:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: ee4cf4373cec53ef23a9711b6e443615 SHA-1: 11766c7d9fecc2b437cf0598e1f6f0e64a622025 SHA-256: 8179ab458ae90b610e41ddb31f99e4a5f3156e6a50421927238e9bf905268ef9
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://kuzutuzo.ru/strik?utm_term=what+is+prose+poetry PDF link annotation
    • http://rufafepikawaj.22web.org/arjun_reddy_movie_images_with_quotes.pdfIn PDF document text
    • http://lnstagramservicecopyrights.com/renajiboduwuferibowowibikyzo4.pdfIn PDF document text
    • http://kosolamod.22web.org/monetizafoxupojadawakonuw.pdfIn PDF document text
    • http://wersita.fun/befixuribafimebipujebeif00q.pdfIn PDF document text
    • http://chtotakoevuxom.biz/35258035699lzrxb.pdfIn PDF document text
    • https://bigimenuxorotel.weebly.com/uploads/1/3/4/6/134655509/kofakusop.pdfIn PDF document text
    • http://vowujebotoza.mywebcommunity.org/how_to_pair_turtle_beach_stealth_700_to_xbox_x.pdfIn PDF document text
    • http://copyrighthelpcentral.com/all_my_sons_play_setting4lrjw.pdfIn PDF document text
    • http://dirozigumifew.scienceontheweb.net/balemoruriruzetuvet.pdfIn PDF document text
    • https://gosidobesek.weebly.com/uploads/1/3/4/0/134017516/2f4ea540f0d23c4.pdfIn PDF document text
    • https://miravavomi.weebly.com/uploads/1/3/1/4/131410597/xasisidomujivedofoj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://riserurilipel.rf.gd/amplificatore_operazionale.pdfIn PDF document text
    • https://s3.amazonaws.com/fadadedezeker/13810608523.pdfIn PDF document text
    • https://s3.amazonaws.com/pusolefosex/madrid_city_guide.pdfIn PDF document text
    • http://rolubumemetujin.atwebpages.com/45117879373.pdfIn PDF document text
    • http://zodiripek.myartsonline.com/fujuzox.pdfIn PDF document text
    • http://tirevotijo.epizy.com/wanokalimizisi.pdfIn PDF document text
    • http://diwiludoki.rf.gd/logitech_wireless_mk320_drivers.pdfIn PDF document text
    • http://vubulebutaxa.epizy.com/watogikarujavi.pdfIn PDF document text
    • http://tazododamir.rf.gd/70988114987.pdfIn PDF document text
    • https://s3.amazonaws.com/moduxanakuri/how_to_set_up_an_element_tv_with_directv.pdfIn PDF document text
    • https://s3.amazonaws.com/vazisi/14918938606.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_off00010c12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C12 4992 bytes
SHA-256: 050731d4ae43fa5f21226cc4587984ce8f9a36903916a33b290db7c5b6a3e566
font_01_sfnt_off00011d18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D18 10664 bytes
SHA-256: 9b2b00e0136cfb14cfe8b13b67fc08bfdf23cce5ede576377eaceba629aa2314

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