Malicious PDF — malware analysis report

Static analysis result for SHA-256 7061e7921d37b0cd…

MALICIOUS

PDF

64.0 KB Created: 2021-05-24 19:45:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 511359eea8db68897b51cfe9ccc74e8f SHA-1: 8740c772dee8df9fcdf96bba4752a51c9611b627 SHA-256: 7061e7921d37b0cda12a39cac69953405dd25d943ba04a323d96f5be6f482835
154 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous URLs pointing to compromised websites and disposable hosting. These links likely serve as lures for phishing attacks or to distribute further malware payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9958

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://primewestelectrical.com/wp-content/plugins/super-forms/uploads/php/files/53bf00892973ede2f03d311f86805e01/gozanetu.pdf
    • http://grani-tonkogo-mira.ru/wp-content/plugins/super-forms/uploads/php/files/d3290fc59ed1d41e8547236168a12ab7/34889236948.pdf
    • https://rffsev.ru/wp-content/plugins/super-forms/uploads/php/files/b8fb5912d681112b7a3e8599ff0927b9/newuli.pdf
    • https://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/1cee060a16d755b71407289b19a96f99/kufelitoxutabunijewomi.pdf
    • http://www.assignproject.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091995cd63b5---sediw.pdf
    • http://anhuizpyy.com/upload_fck/file/2021-4-29/20210429152955247308.pdf
    • https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160aa0037b2fd4---70193513771.pdf
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/fe34fb7a84a287418a7dbdab862d9053/gafokefima.pdf
    • https://www.mobytec.com.br/mobytec/wp-content/plugins/formcraft/file-upload/server/content/files/1608caf537e2be---31880019303.pdf
    • http://sl-light.ru/design/img/upload/file/pulusiximojen.pdf
    • http://vitaminyplus.eu/files/file/xikoli.pdf
    • https://cristiandellavedova.com/wp-content/plugins/super-forms/uploads/php/files/fpr30dttm2m7f3bcvmqelia2l5/murububesigadalat.pdf
    • http://eko-inwest.eu/upload/file/13939970005.pdf
    • http://sieckultury.pl/wp-content/plugins/super-forms/uploads/php/files/9e103799a50af040260736c3e05363b4/98065478289.pdf
    • http://eltonltd.ru/sites/default/files/uploads/27430110902.pdf
    • https://alamansyria.com/userfiles/file/dosuwugurigivin.pdf
    • https://terravistahometeam.com/wp-content/plugins/super-forms/uploads/php/files/4c7a4c8f0ab0c2e4112b8eae94110e54/xomuzurapuvowarupivemam.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=how+to+get+bloons+td+6+free
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e064.bin
bd346c5651ec0c34e39388f7ada46d07241e4c43849450bd41e29268c3f55161		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE064 5212 bytes

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