Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc1dbf9dbabb070f…

MALICIOUS

PDF

88.8 KB Created: 2021-06-27 10:36:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6f96eb485056b5b7943e6173edd92cad SHA-1: e601843aefedbaa1d26464e1002c73c7e7408c60 SHA-256: cc1dbf9dbabb070f56fbac8d4668cfd5bc583d9532f677b456ef36b79d39383a
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to potentially compromised websites and disposable hosting, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 6

  • 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
  • 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://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/ag66ttp9ui4eictfaqo7atqnof/funesoxibotefugukinadef.pdf
    • http://coral-travel66.ru/admin/ckfinder/userfiles/files/degulatidixujotizuxatuze.pdf
    • http://beiwendq.com/userfiles/file/49481943773.pdf
    • http://adamlegal.com/userfiles/file/29451370489.pdf
    • https://tucsonhomewindowtint.com/wp-content/plugins/super-forms/uploads/php/files/e795906343758a68e68a00491bca7185/tomatokakijexidilop.pdf
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/b7af89964c3acbc245b97751bd54e4d0/panedipi.pdf
    • http://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c65683b491---58685755875.pdf
    • http://www.odnpoznan.pl/fotki/file/file/zorikonu.pdf
    • https://investainternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d366de3824---vevijobisadidubakug.pdf
    • https://mosoptagro.ru/wp-content/plugins/super-forms/uploads/php/files/204e70578d2548609c3ab0eda91c8053/jipeka.pdf
    • http://cetinelektrik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1608fb2a07a4a0---gisufesururezumepifi.pdf
    • http://shinserviceodi.ru/wp-content/plugins/super-forms/uploads/php/files/0f4f54d9e8e0be450a3e124fb96f67d5/31051399891.pdf
    • https://www.saltriot.com/wp-content/plugins/super-forms/uploads/php/files/e8a8bbb64ef84a0f5b2684dec11b8847/velugutefowuxojenizav.pdf
    • http://hayatteknoloji.com/webimage/file/viputitelemuje.pdf
    • https://hostsolutions.ro/app/webroot/files/userfiles/files/21424520790.pdf
    • https://blsautomation.com/ckfinder/userfiles/files/76684060009.pdf
    • https://carstenrath.com/wp-content/plugins/super-forms/uploads/php/files/54ednni0g63de63rc5g8g44lfi/nojinamexopugadumen.pdf
    • https://solo-enoant.com/content/files/files/womubasebifovi.pdf
    • https://donnasalon.ru/wp-content/plugins/super-forms/uploads/php/files/3fde31ad6da96833f4b7908b0b90ca42/61664697111.pdf
    • https://mudateconmigo.cl/wp-content/plugins/super-forms/uploads/php/files/de65edf3606b8e4b43273c0a37067152/fogepivipov.pdf
    • https://terravistahometeam.com/wp-content/plugins/super-forms/uploads/php/files/35ffff407befb0b9be6eb240f7b8d622/39333757188.pdf
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/k02buhf8hkjg7f62jfaktk2pj3/85360573637.pdf
    • http://sns.hu/_user/file/18746869196.pdf
    • http://call.ae/wp-content/plugins/formcraft/file-upload/server/content/files/1607ab449cb07d---towukokoluwos.pdf
    • http://beateromer.com/bilder/file/zoronelefaxuju.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=how+to+unsend+a+message+on+instagram+without+them+knowing
    • 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_off0000f8b8.bin
f46f45be0db6b6adb4ea99d9c3d6ae7ebe060afd0565fe82d4445c24b3833fa0
pdf-font-stream PDF embedded font (sfnt) at offset 0xF8B8 16896 bytes
font_01_sfnt_off00012434.bin
f7188a9f7584392137396d74d34fd0ff17bdf59f5bd71b7c1c0f35f2b33e70cf
pdf-font-stream PDF embedded font (sfnt) at offset 0x12434 10920 bytes
font_02_sfnt_off00013d21.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13D21 16792 bytes