Malicious PDF — malware analysis report

Static analysis result for SHA-256 9acb660f08a27ecb…

MALICIOUS

PDF

80.2 KB Created: 2021-09-04 16:36:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 63eeb7e3dd96a2631241d05f362bc73d SHA-1: fc8c1c606e6afe2f4bbc2097358c61ab3de1bb18 SHA-256: 9acb660f08a27ecb1a0fb0eaaf018978359b092a318870638c259abb31e46da9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many of which point to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The presence of external URIs and the overall structure point towards a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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
  • 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 https://cructi.ru/uplcv?utm_term=harmonic+analysis+music+pdf PDF link annotation
    • https://purebodycare.courses/wp-content/plugins/super-forms/uploads/php/files/tm7oljejvqaqiothflee7a11ie/24643465302.pdfIn PDF document text
    • https://mama-light.net/business_school/uploads/file/93213020052.pdfIn PDF document text
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606dca2d33847---junune.pdfIn PDF document text
    • http://combatkuntao.com/ckeditor/ckfinder/userfiles/files/rifekugobofanumifamezedok.pdfIn PDF document text
    • http://zs-oilfieldequip.ru/d/files/58630887453.pdfIn PDF document text
    • https://www.hadlowsecurityshutters.com/wp-content/plugins/super-forms/uploads/php/files/1f086eff4b570e83c5b1e57f222b83a8/zixomi.pdfIn PDF document text
    • http://basyapiemlak.com/yukleme_klasoru/userfiles/file/34579308957.pdfIn PDF document text
    • http://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/1609ebcf7a5431---fugufijufu.pdfIn PDF document text
    • http://marcelponjee.nl/ponjeefiles/file/33879801122.pdfIn PDF document text
    • http://antifftech.com/uploadfile/file///2021061321012766.pdfIn PDF document text
    • http://floridadressyourhome.com/uploaded_files/userfiles/files/gafilafawikax.pdfIn PDF document text
    • http://hollywoodterrace.org/clients/863344/File/26908347317.pdfIn PDF document text
    • http://execdentalclinic.com/uploads/ckfinder/userfiles/files/87265678515.pdfIn PDF document text
    • https://www.pirkitpadangas.lt/ckfinder/userfiles/files/gokovujetumiluxido.pdfIn PDF document text
    • http://www.tsahimmongol.com/uploads/images/files/doxofuzuxosagowimapeluge.pdfIn PDF document text
    • https://www.albispanaderia.com/wp-content/plugins/super-forms/uploads/php/files/10d96ddd614c6db3afd450c24df5f338/24767908081.pdfIn PDF document text
    • https://www.champagne-cornevin.fr/ckfinder/userfiles/files/2725696711.pdfIn PDF document text
    • http://luckdidea.com/ckfinder/images_store/files/98729781594.pdfIn PDF document text
    • https://aokman-drive.com/d/files/vinelemobeguperuti.pdfIn PDF document text
    • https://learnrkb.jugalbandiresearch.com/ckfinder/userfiles/files/74809653597.pdfIn PDF document text
    • http://foto-preiss.at/upload_files/files/4275568591.pdfIn PDF document text
    • http://dreiseengrundschule.de/files/sepadet.pdfIn PDF document text
    • https://bxthirteen.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/c374b720212b2b9af0196859af4c5ab2/46678847012.pdfIn PDF document text
    • 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_off0000d313.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD313 18320 bytes
SHA-256: 566eeb12794c992ed169054364fb2dc65b22d1d9ed2dbba6dc5b024e932f79eb
font_01_sfnt_off000102fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102FC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011b13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B13 10756 bytes
SHA-256: ee68a5d4714a913b6017ed3613774044d44a7376520a6bfc2fef286dd1b6ff94

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