Malicious PDF — malware analysis report

Static analysis result for SHA-256 d21424c4fa4a6dcf…

MALICIOUS

PDF

78.0 KB Created: 2021-02-18 02:42:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 06962b713bbf9ef1ae39034ea04c05ca SHA-1: b575c02976829bfb64dc903e7fbf29122a7e95f0 SHA-256: d21424c4fa4a6dcfe1df70c996d38fb92b04bf56f4313541aec524108fb4bf6e
194 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm used for phishing or malware distribution. The embedded URL 'https://maypoin.ru/strik?utm_term=handy+stitch+awl' is a primary indicator of a potential phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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.
  • 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://maypoin.ru/strik?utm_term=handy+stitch+awl PDF link annotation
    • https://lojavexir.weebly.com/uploads/1/3/5/9/135963097/7812851.pdfIn PDF document text
    • https://vapovudinawixe.weebly.com/uploads/1/3/1/4/131437980/2296075.pdfIn PDF document text
    • https://cdn.sqhk.co/kuzosexiwugu/IGgegdY/sonud.pdfIn PDF document text
    • https://cdn.sqhk.co/wibafozadil/hgv8Ihd/64547670891.pdfIn PDF document text
    • https://cdn.sqhk.co/gixedomawa/ghxighh/66918847699.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418791/normal_6002ea979d313.pdfIn PDF document text
    • https://cdn.sqhk.co/wirowanorax/Z9Yg9tv/bridge_constructor_medieval_gameplay.pdfIn PDF document text
    • https://jigugupidutugi.weebly.com/uploads/1/3/0/8/130813301/togizosomasi-kuwofukiridatid-bukibalilewovar.pdfIn PDF document text
    • https://ramakizuwag.weebly.com/uploads/1/3/4/3/134321509/0406e4b5.pdfIn PDF document text
    • https://salobomuxalevi.weebly.com/uploads/1/3/1/0/131070078/585c493eb58252.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/xijalovelokolep/insanity_flyff_leveling_guide_200-_300.pdfIn PDF document text
    • https://s3.amazonaws.com/fopalew/assalto_imperiale_manuale.pdfIn PDF document text
    • https://s3.amazonaws.com/fejenijovekozu/emulator_nintendo_switch_apk_android.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB7A 5088 bytes
SHA-256: 7c071ebea1c68f9e316d5a63e5d9b595b820ccd9ac1d629d6d188ad5968bc556
font_01_sfnt_off0000fcd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCD9 1800 bytes
SHA-256: daad3f347a4f42f432ee9983e619a7c063e36761dba5934b469418034847e28e
font_02_sfnt_off00010567.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10567 10712 bytes
SHA-256: 1caabc1087a410f3b17b0320712d0a6cca5dabed3870886dc5127956213a6f4b

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