Malicious PDF — malware analysis report

Static analysis result for SHA-256 28d76573dd0433bd…

MALICIOUS

PDF

66.5 KB Created: 2021-09-29 13:50:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 343724f69799d1877c6b1c16e867fc42 SHA-1: 875d20dce6d0197883749b01890ebbc5b51c3b39 SHA-256: 28d76573dd0433bd45ad4e889d1840d3f022a18f2441936e7675756b29047ad1
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier indicating maliciousness. The PDF contains numerous embedded URLs pointing to various domains, consistent with a link farm designed to obscure the ultimate destination. The presence of a PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this, indicating a pattern of using many distinct, disposable hosts. No scripts were extracted, and the document body was heavily obfuscated.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6143

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 http://queensparkview.com/image/upload/File/lisibufisa.pdf In PDF document text
    • http://constantemail.com/userfiles/file/163105278053403616946.pdfIn PDF document text
    • http://am-assets.com/aom/magnolia/userfiles/file/mesukibamigazilomar.pdfIn PDF document text
    • http://vmkmsz.hu/userfiles/file/94458666003.pdfIn PDF document text
    • http://trenermichal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1614e4df6456f8---27111198005.pdfIn PDF document text
    • http://v-lukomorie.com/uploader/files/wilosuxelapixajifusu.pdfIn PDF document text
    • http://zamel2.pl/userfiles/file/lonivitowumuti.pdfIn PDF document text
    • https://cabinetscounters.com/ckfinder/userfiles/files/sutori.pdfIn PDF document text
    • http://pneusmarene.it/images/file/1355114983.pdfIn PDF document text
    • https://efckrakow.pl/userfiles/file/navugivin.pdfIn PDF document text
    • http://midel.me/userfiles/file/1352390107.pdfIn PDF document text
    • http://hengtongrongshang.com/jingkelun/userfiles/files/20210912011503.pdfIn PDF document text
    • https://dailyiat.com/html_upload/file/mukoxotitolu.pdfIn PDF document text
    • https://clubkdo.fr/img/pics/files/7548451023.pdfIn PDF document text
    • http://shangrilatheshow.com/ckfinder/userfiles/files/22373658173.pdfIn PDF document text
    • http://mocphatreal.com/assets/images/ckfinder/files/66026048254.pdfIn PDF document text
    • http://casaperugia.fr/userfiles/file/xadagog.pdfIn PDF document text
    • http://rulife.ru/ckfinder/userfiles/files/tatorosexalefun.pdfIn PDF document text
    • https://coherence.cz/userfiles/file/wifexiriputisal.pdfIn PDF document text
    • http://balmybnb.com/t/tutorfirm/uploads/ck/files/letunofowumojijusekometiw.pdfIn PDF document text
    • http://fukaofoods.tw/uploads/files/202109202349305662.pdfIn PDF document text
    • http://sdes.in/uploads/gemis.pdfIn PDF document text
    • https://doxity.ro/ckfinder/userfiles/files/51099503693.pdfIn PDF document text
    • https://svltv.in/userfiles/files/3274908259.pdfIn PDF document text
    • http://xn--80aaaaadfwa5aftjhxrkcrg8iwc.xn--p1ai/pict/file/witafabumuserewom.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=rom+redmi+note+5PDF link annotation
    • 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_off0000b07a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB07A 17300 bytes
SHA-256: 01c26173ed6498238140c36c7d77b37829e7d1f463ea0ef9f776add95fbed33f
font_01_sfnt_off0000dc40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC40 10212 bytes
SHA-256: e4e1cb2d4ba7a04f737379600c50773da5986525c504b79747122409aa839fb0
font_02_sfnt_off0000f326.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF326 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.