Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fc1d1f68db293a5…

MALICIOUS

PDF

76.5 KB Created: 2021-03-11 00:49:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 7b9688d5be6deaf1e3aeb1dda79bc7a0 SHA-1: 9f8df3cd4f635d917f351cc5cf1df6b1d2114314 SHA-256: 8fc1d1f68db293a5d45a23cda611d4478208c24c342f03a5df981a97f9b2397b
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9992

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://maypoin.ru/123?utm_term=nice+guidelines+antibiotic+prophylaxis+endocarditis PDF link annotation
    • http://pexosoduriku.iblogger.org/deburuxerafow.pdfIn PDF document text
    • http://dusamoka.mywebcommunity.org/nuvirafifezikesudi.pdfIn PDF document text
    • http://tetiviguxawik.getenjoyment.net/22283433703.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482623/normal_601a394ac4085.pdfIn PDF document text
    • http://vasakuso.sportsontheweb.net/how_to_crop_a_video_in_adobe_premiere_elements_15.pdfIn PDF document text
    • https://cdn.sqhk.co/xibetevoxaj/7Gdjcje/billiards_game_free_download_for_pc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444095/normal_603160e31ee6c.pdfIn PDF document text
    • http://nurigoluda.mygamesonline.org/78253534104.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491169/normal_6002a01de7f9b.pdfIn PDF document text
    • https://cdn.sqhk.co/teganipuputu/LdfgfZ2/29838798383.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424953/normal_601fcb291de92.pdfIn PDF document text
    • https://cdn.sqhk.co/pibilebomek/GX6jhge/bunudabagizofi.pdfIn PDF document text
    • http://lapitubemexidi.mywebcommunity.org/witelonula.pdfIn PDF document text
    • http://motogulexeb.iblogger.org/29531020020.pdfIn PDF document text
    • http://larebalin.mypressonline.com/depaburapa.pdfIn PDF document text
    • http://ridaxaki.mywebcommunity.org/guitar_chords_chart_for_beginners_with_fingers_download.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/wipotegadodorek/67934072141.pdfIn PDF document text
    • http://newubopuga.epizy.com/java_eclipse_ide_for_windows_7.pdfIn PDF document text
    • http://kevawiposiwa.rf.gd/48813069626.pdfIn PDF document text
    • https://s3.amazonaws.com/dabatisew/vifowezewinepibiwajuk.pdfIn PDF document text
    • https://s3.amazonaws.com/daselex/wobebur.pdfIn PDF document text
    • http://feliruxitekul.epizy.com/tisalal.pdfIn PDF document text
    • https://s3.amazonaws.com/tuzamada/how_to_repair_my_credit_report_myself.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_off0000eb83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB83 5616 bytes
SHA-256: 70a183c36cd705c459ae41f331c2ddaff18d26caf9175ddc1b5b737d5bf9a9a6
font_01_sfnt_off0000fea5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEA5 11084 bytes
SHA-256: a90c302f73c13428f8bd84a3d92e1038fc5886a8a335c4e8e0a745f8c54b6609

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