Malicious PDF — malware analysis report

Static analysis result for SHA-256 07f25e689a01dd65…

MALICIOUS

PDF

80.8 KB Created: 2021-09-10 13:14:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 297588df3b2dc80f35cc64c99f79b873 SHA-1: 6fd77965618b95626643339a1520c292944f17f7 SHA-256: 07f25e689a01dd65b9356a1e8fc1c098de3bddaded7a129145ed156cbd484446
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ML and ClamAV as malicious, with heuristics indicating it's a link farm on disposable hosting. The embedded URLs, though many are unknown, point to a pattern of redirecting users to potentially malicious content. The presence of PDF_SEO_DISPOSABLE_LINK_FARM suggests a deliberate attempt to obscure the final destination, characteristic of phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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 http://drivescuolaguida.it/userfiles/files/tufamutezix.pdf In PDF document text
    • https://basisangka.com/contents/files/dowavanozowagetoruriduxe.pdfIn PDF document text
    • https://datawire.gr/files/files/menesepikonow.pdfIn PDF document text
    • http://voszveszprem.hu/_user/file/zagixizab.pdfIn PDF document text
    • http://edmo-cars.nl/images/file/2758592904.pdfIn PDF document text
    • https://www.spitalmoldovanoua.ro/ckfinder/userfiles/files/85986891910.pdfIn PDF document text
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137bdcc40fc9---waforaw.pdfIn PDF document text
    • http://ormansagszive.hu/upload/file/finukupisuwuxiluxiginulo.pdfIn PDF document text
    • http://w-f-l.de/user_img/file/14333774720.pdfIn PDF document text
    • http://aelma.com/sites/default/userfiles/file/bufimedekadidepez.pdfIn PDF document text
    • http://ecohouse-lab.com/userfiles/file/zewajuxumerozabikekigubo.pdfIn PDF document text
    • http://salespate.com/userfiles/file/22361298059.pdfIn PDF document text
    • http://shortguycentral.com/ck_uploads/files/xobeka.pdfIn PDF document text
    • https://khotelmarket.com/FileData/ckfinder/files/20210907_5670560B5C57E763.pdfIn PDF document text
    • https://atvatextile.com/upload/ckfinder/files/vuxubofok.pdfIn PDF document text
    • https://dhesient.com/media/kabadozidixeg.pdfIn PDF document text
    • http://elcivan.com/admin/UserFiles/file/mosufulanoruko.pdfIn PDF document text
    • http://telegid.tv/userfiles/files/lazegupiperutovod.pdfIn PDF document text
    • https://ms01bet.com/contents/files/xenetujixuxi.pdfIn PDF document text
    • http://awarelaxcentrum.cz/user_files/file/tadex.pdfIn PDF document text
    • https://pinyardim.com/calisma2/files/uploads/takizodezanijoj.pdfIn PDF document text
    • https://bhandarisurgical.com/ckfinder/userfiles/files/3622886743.pdfIn PDF document text
    • http://skkl.cn/filespath/files/20210902060015.pdfIn PDF document text
    • https://tepatsasaran.com/contents/files/dibilujoxadapiguf.pdfIn PDF document text
    • http://zenithmetals.com/files/60997663490.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=android+check+my+numberPDF link annotation
    • 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_off0000d7fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7FC 17892 bytes
SHA-256: c17f8377c12aebf32627041b9173d790492f4eba2b438f0466f78a97efb0f0b6
font_01_sfnt_off000105c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105C5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011ddc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DDC 10588 bytes
SHA-256: 67953bedfa2a6431d20567b048586e850c0bcd2d5a60d005f6d8d2f36dd815c1

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