Malicious PDF — malware analysis report

Static analysis result for SHA-256 9bf6622ac444ac18…

MALICIOUS

PDF

79.0 KB Created: 2021-03-15 00:01:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 50744e5faa3386c905f1e78132f0b948 SHA-1: e7e168313c23581d31fbbd0b4affe5582dc4a22e SHA-256: 9bf6622ac444ac187527d319c1275da614cc5b1b8472f2116432216c14c5efe6
186 Risk Score

Malware Insights

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

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 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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=dehydration+fever+in+neonates+pdf PDF link annotation
    • https://sunajekivogemaz.weebly.com/uploads/1/3/4/8/134895881/ralub.pdfIn PDF document text
    • https://cdn.sqhk.co/sewadokoka/ohWji1g/tron_lights_for_bike.pdfIn PDF document text
    • http://zusagukitu.mywebcommunity.org/lagikibejesujivozoxufefan.pdfIn PDF document text
    • http://tepugorotewole.medianewsonline.com/65954469706.pdfIn PDF document text
    • https://cdn.sqhk.co/kisesawaropo/rgj5ihi/foxone_gratis_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/tumosirewuw/hlxjcjf/amaze_2018_ground_clearance.pdfIn PDF document text
    • https://cdn.sqhk.co/gevolonovare/9hcTwTd/guzagebukusogaluva.pdfIn PDF document text
    • https://cdn.sqhk.co/rapawaferew/ichchdN/62099685697.pdfIn PDF document text
    • https://cdn.sqhk.co/tarudifirew/hfpjfJD/vusegexanunirodel.pdfIn PDF document text
    • https://cdn.sqhk.co/waboperunut/uc5ggja/manualidades_faciles_de_halloween_murcielagos.pdfIn PDF document text
    • https://cdn.sqhk.co/pobumepova/ibjbEhe/nail_drill_bits_for_dremel.pdfIn PDF document text
    • https://femuketidoxesi.weebly.com/uploads/1/3/3/9/133997502/7044328.pdfIn PDF document text
    • https://taxudomajifi.weebly.com/uploads/1/3/4/1/134108655/290764.pdfIn PDF document text
    • https://cdn.sqhk.co/baxemazisod/cqhiOih/62383770341.pdfIn PDF document text
    • https://cdn.sqhk.co/pisomuma/UEjaha2/wosufixotem.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://noxukimu.myartsonline.com/jaginiwa.pdfIn PDF document text
    • http://kakasis.onlinewebshop.net/will_hydrogen_peroxide_cure_toenail_fungus.pdfIn PDF document text
    • http://gudugapapilile.atwebpages.com/abs_workout_routine_at_gym.pdfIn PDF document text
    • https://s3.amazonaws.com/tibanepoxilibud/rearrange_pages_nitro.pdfIn PDF document text
    • https://s3.amazonaws.com/regovadeje/11008479246.pdfIn PDF document text
    • https://s3.amazonaws.com/besafefaf/94385835580.pdfIn PDF document text
    • https://s3.amazonaws.com/ronatiduzoxij/9943295452.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_off0000f85a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF85A 5256 bytes
SHA-256: e5b5bdcc71dc98b0c793ad87bbdfbad00359dc025a55640b7fae2ceb8e92f342
font_01_sfnt_off00010a50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A50 10616 bytes
SHA-256: 027bdb82fadb54caccc0474eb4fd6e99c97f02117b61785d90a902544dc7f050

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