Malicious PDF — malware analysis report

Static analysis result for SHA-256 27a47dc1b3f5f89c…

MALICIOUS

PDF

62.3 KB Created: 2021-09-25 17:31:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: dfd87e7c8f83b4848b292303bc13c529 SHA-1: edb6edcebf86b098c12d92e6c814e3164714463c SHA-256: 27a47dc1b3f5f89c4ef6d4ce2b17085eadf82575b571116d0f18f564cf827cce
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to disposable domains, indicating a link farm designed to obscure the ultimate destination. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of an attempt to redirect the user to a malicious site, potentially for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6177

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://thehouseproduction.net/file/95661781316.pdf In PDF document text
    • http://artgrafika.cz/userfiles/file/ludujevutumasasofafujuf.pdfIn PDF document text
    • https://24emk.ru/ckfinder/userfiles/files/12383162037.pdfIn PDF document text
    • https://ra7a7p-h3ba7.com/contents/files/47943505637.pdfIn PDF document text
    • https://chiuman-hk.com/images/file/75125732984.pdfIn PDF document text
    • http://archiw.gbpopatowiec.pl/img/upload/files/79871638092.pdfIn PDF document text
    • http://myshopgroup.com/userfiles/files/17985779234.pdfIn PDF document text
    • http://color-gateway.com/userfiles/file/24739710514.pdfIn PDF document text
    • https://rivieresoceanie.com/userfiles/file/46322802132.pdfIn PDF document text
    • http://sys-svinding.dk/userfiles/file/10080648060.pdfIn PDF document text
    • http://snp-ent.com/files/fckeditor/file/48870010061493e1a20c40.pdfIn PDF document text
    • http://xn--or3bi2da319p.com/upload/fckeditor/file/nijemulexatepaluga.pdfIn PDF document text
    • http://geomanteia.com/userfiles/files/padudigemitusuninabajuwe.pdfIn PDF document text
    • http://lngpetro.com/userfiles/file/71095516533.pdfIn PDF document text
    • http://kahasat.cz/data/file/getinediguvafebepero.pdfIn PDF document text
    • http://kimbuunguyen.com/uploads/userfiles/file/40713687303.pdfIn PDF document text
    • https://onlinendttraining.net/files/repibefobekajilogefeza.pdfIn PDF document text
    • https://www.mnogotrop.com/ckfinder/userfiles/files/57272569948.pdfIn PDF document text
    • https://affordans.com/ckfinder/userfiles/files/fizalujipezezowegarepafal.pdfIn PDF document text
    • http://www.eatvirukai.lt/uploads/files/73962676926.pdfIn PDF document text
    • https://www.auto-ecole-rive-droite.fr/ckfinder/userfiles/files/wulebatoxaz.pdfIn PDF document text
    • http://arcomproltd.com/userfiles/file/gatokugomamosaruraw.pdfIn PDF document text
    • http://luxlustry.ru/img/upload/pubogabopafilapoxamu.pdfIn PDF document text
    • https://groupburuemas2.com/contents/files/rugidikezolaginevuvafoziw.pdfIn PDF document text
    • http://remont-elektro.eu/archiv/file/88336347508.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=transferring+data+from+one+phone+to+anotherPDF link annotation
    • 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_off0000b798.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB798 17368 bytes
SHA-256: 149fa84ea8f6b8a4e829e3a069566892825604354e93b859c09bac6bf873b51a
font_01_sfnt_off0000e466.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE466 10860 bytes
SHA-256: 687b047980e41aa20ca529d7acf3660912449970abff9c89864e9ec159399e71

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