Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a806a83f949fa58…

MALICIOUS

PDF

87.8 KB Created: 2021-06-30 13:33:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 99fa70c2f0ffef6dec32439d697300fd SHA-1: 57a841f8d0f45f922e582d6e985597a27b89d7a0 SHA-256: 9a806a83f949fa583daf3e2981feb17a61120e68c53039bb5081372a698f7f45
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. It contains numerous links pointing to compromised WordPress upload directories and other disposable hosting, suggesting a link farm designed to distribute malware or phish users. The embedded URLs, such as 'https://ketchas.ru/uplcv?utm_term=romeo+and+juliet+full+movie+online', are likely used to redirect victims to malicious sites. No scripts were extracted, but the PDF structure and URL patterns are indicative of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://ketchas.ru/uplcv?utm_term=romeo+and+juliet+full+movie+online
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd6cbea90bc---87580841800.pdf
    • http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160989e3077328---41751580555.pdf
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/16084d7fa31f95---popazuzikafovepasezalalat.pdf
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609695bea3d59---jofajenuluf.pdf
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/2c8f43ce5e930f8102e1968754a02fe3/zesanebakizepuxajego.pdf
    • https://biovuspharma.net/userfiles/files/36171925212.pdf
    • https://seroinstitute.com/wp-content/plugins/super-forms/uploads/php/files/9c007eee13202f2e6783d433e5925097/25753460526.pdf
    • https://gea99.com/ckfinder/userfiles/files/39629906785.pdf
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608589dd5705b---tofexojukavom.pdf
    • https://a2designbg.com/userfiles/file/muzodetejaredevel.pdf
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/cd87aa64e5ee9a93f307fd6546416991/bedukitojopixusetavufiw.pdf
    • https://arihantgranites.in/wp-content/plugins/super-forms/uploads/php/files/cabaoheqi65ilgtm2o3brhkq84/44596769416.pdf
    • http://akinmedikal.com/uploads/file/wakuzipovabike.pdf
    • https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/ffaf9226c1a5d1789ad81beaae7b19c5/fuvusuvafanezojuxise.pdf
    • https://www.ciabrini-immobilier.com/wp-content/plugins/super-forms/uploads/php/files/u3hjc4iau9q485ls3c8t3gj5s8/25477379481.pdf
    • http://suportti.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608862a2ef39c---42202386438.pdf
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/e66bbcbfa380964a86853820bf9f1374/98031767224.pdf
    • http://theheavent.com/userfiles/files/73914602836.pdf
    • http://diamond6ranch.com/userfiles/file/77695520347.pdf
    • http://cageart.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16085fb26b650e---bedirinopipifakewegonim.pdf
    • http://uci.ir/userfiles/file/mejifibozetisajajopebuja.pdf
    • https://kajariaadsevents.com/admin/uploads/file/kevoredunefisabo.pdf
    • https://www.skyline-recruiting.com/wp-content/plugins/super-forms/uploads/php/files/e5bae45443cc07a627e8b0b488a4c390/xadizef.pdf
    • http://mebelhotel.ru/userfiles/files/pidadamodugiwewupokovo.pdf
    • http://ks4073.com/file_media/file_image/file/79066199082.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f491.bin
4edb5ed33abd9cab58fd0d89258b1d45c25af41bdf356f28b54c36b37e171d05
pdf-font-stream PDF embedded font (sfnt) at offset 0xF491 17408 bytes
font_01_sfnt_off000121ab.bin
91c2d1e2eac92c068fd377ada3149409614daf7eaca485bba1362b24310c6958
pdf-font-stream PDF embedded font (sfnt) at offset 0x121AB 10588 bytes
font_02_sfnt_off000139c7.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x139C7 16792 bytes