Malicious PDF — malware analysis report

Static analysis result for SHA-256 60a1c991113b9eee…

MALICIOUS

PDF

84.8 KB Created: 2021-09-15 17:59:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 62d9b678ddf0e2957b937a1ebe6f3b5c SHA-1: 63101d47bb75b8edb55294d84323f2c43cf62b5b SHA-256: 60a1c991113b9eee9f43bfb676afb48e59e478d0fe7376698244e570442c626d
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier indicating maliciousness. It contains embedded JavaScript and numerous external links, many of which are part of a link farm on disposable hosting, suggesting an attempt to redirect users to malicious sites or download further payloads. The presence of a 'download button' lure further supports a phishing or scamming intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://crewmak.ru/uplcv?utm_term=pes+21+ppsspp+ps5+camera+download PDF link annotation
    • https://eatorhours.org/e-bussiness/fckimages/file/91559597220.pdfIn PDF document text
    • https://vinocastillo.hu/editor_up/nisozepu.pdfIn PDF document text
    • https://tainandentist.com/uploads/files/202109100127466550.pdfIn PDF document text
    • http://tractortools.cz/ckfinder/userfiles/files/27325511504.pdfIn PDF document text
    • http://aptekadc.pl/userfiles/userfile/2448448073.pdfIn PDF document text
    • https://himalayanthailand.com/image/upload/File/13381817203.pdfIn PDF document text
    • http://tsrmmessina.it/userfiles/files/42421949126.pdfIn PDF document text
    • https://tiemhoamo.tiemhoahaibara.com/data/dulieu/files/dufosigegerit.pdfIn PDF document text
    • https://goldfieldssanddrags.com.au/ckfinder/userfiles/files/50489157871.pdfIn PDF document text
    • https://locktactyuma.com/ckfinder/userfiles/files/tidifezogalikizanuzusaw.pdfIn PDF document text
    • http://acrclubinversores.com/files/galeria/files/88998918828.pdfIn PDF document text
    • http://tks-forever.com/upload/2021/09/12/file/19873259786.pdfIn PDF document text
    • http://irk-yoga.ru/upload/files/16406519303.pdfIn PDF document text
    • http://silarperu.com/UserFiles/file/14085630967.pdfIn PDF document text
    • http://tsnpharma.com/upload/files/xozeganifekunulobipatoded.pdfIn PDF document text
    • https://jeneifogaszat.hu/cikkdata/files/99482002738.pdfIn PDF document text
    • http://sendedianqi.com/upload_fck/file/2021-9-9/20210909013855858775.pdfIn PDF document text
    • https://ecowaytechnologies.com/ckfinder/userfiles/files/zofidurubexukuvinabivab.pdfIn PDF document text
    • http://tavio.su/files/file/jejapejonobitijadufonev.pdfIn PDF document text
    • http://synphabase.ch/upload/file/72341601585.pdfIn PDF document text
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138df4e21228---boziwizixokokififemixe.pdfIn PDF document text
    • https://www.theoakshealthcare.com/my_content/js/ckfinder/userfiles/files/42481696309.pdfIn PDF document text
    • https://shiprapublication.com/uniformkontakt/userfiles/image/files/tojamoxisuzakowabeli.pdfIn PDF document text
    • http://rigdrilling.org/userfiles/file/10395694940.pdfIn PDF document text
    • https://samirkumarpaul.com/ckfinder/userfiles/files/dawirut.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF3E 19868 bytes
SHA-256: 5a2656153d444eaa75b318f143949680f205b5293280715385d73dd125d56def
font_01_sfnt_off000113b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113B6 10880 bytes
SHA-256: 72049b0ccdd1490adcaabd608fddf081f758b6204809bd650e36dab2498a5c61
font_02_sfnt_off00012d10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D10 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1