Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f6dea2a8c41c8b1…

MALICIOUS

PDF

67.9 KB Created: 2021-10-07 03:24:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: c34c7388b19c53e2278382a67cd13573 SHA-1: 6cf9a4754c462f809dda3b4a56f27b00479e5ce0 SHA-256: 5f6dea2a8c41c8b143a3e87747c5039476c996d0667d6f2ffa0d4892ab151aba
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to external domains, many of which are hosted on disposable or suspicious domains, indicating a link farm. ClamAV and ML classifiers flagged this PDF as malicious, likely due to its deceptive nature and potential to redirect users to phishing or malware sites. No scripts were extracted, but the structure suggests it's designed to lure users into clicking links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5231

Heuristics 4

  • 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
  • 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://allytemp.ru/uplcv?utm_term=grenadine+and+blue+curacao PDF link annotation
    • http://e-kva.ru/admin/ckfinder/userfiles/files/77650133635.pdfIn PDF document text
    • https://clickbox.ro/images/file/zikepegipuku.pdfIn PDF document text
    • https://rwd1.thadv.com/upload/files/fuxunar.pdfIn PDF document text
    • http://artdental.hu/editor_up/malofufolofo.pdfIn PDF document text
    • https://xrtradingfeedback.com/cmsimages/file/mimakakaf.pdfIn PDF document text
    • https://hensuyenpqa.traigiongthuha.com/ckfinder/userfiles/files/zexosob.pdfIn PDF document text
    • http://warmistore.com/userfiles/file/rowawal.pdfIn PDF document text
    • http://savalis.ru/userfiles/file/dimuzazisesatifiwoz.pdfIn PDF document text
    • http://residenzaeden-albisola.com/userfiles/files/jedax.pdfIn PDF document text
    • http://koryosushi.com/uploads/files/sepulinagosipitanowebem.pdfIn PDF document text
    • https://veriniams.lt/userfiles/file/58527712866.pdfIn PDF document text
    • http://turystyka.powiatlubartowski.pl/admin/ckfinder/userfiles/files/widuvafusikukokebefebe.pdfIn PDF document text
    • http://vngo-cc.vn/cooker/public/files/57235197937.pdfIn PDF document text
    • https://valgott.com/images/userfiles/file/49027458150.pdfIn PDF document text
    • https://absoger.bmv-communication.fr/uploads/files/15823095626.pdfIn PDF document text
    • http://bsbcarpet.com/userfiles/file/fesitalamogudopa.pdfIn PDF document text
    • http://xn--o39a91gvwm83kbsn.net/FileData/ckfinder/files/20211002_63E5E129E6D50D87.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/161586ae35343a---19571098975.pdfIn PDF document text
    • https://sysyanginguvenlik.com/uploads/files/17863549251.pdfIn PDF document text
    • http://sameiroeventos.pt/ficheiros/sowepapugagadimegutub.pdfIn PDF document text
    • http://dailymaytrogiang.com/userfiles/files/74078140481.pdfIn PDF document text
    • https://jills.reviewz.eu/app/webroot/files/userfiles/files/pidatopovulewurisodor.pdfIn PDF document text
    • http://rioairporttransfer.com/ckfinder/userfiles/files/tepijisowuzuladu.pdfIn PDF document text
    • http://malir-naterac.info/UserFiles/File/45876292451.pdfIn PDF document text
    • http://sampoernastrategic.com/uploads/image/files/15427112486.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c9dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9DD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e1ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1EF 17152 bytes
SHA-256: 681702e463894ba3bcb37c427f06a1b6a769b1677237ae4569a572ac663ec358

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