Malicious PDF — malware analysis report

Static analysis result for SHA-256 e94d08893cde6df7…

MALICIOUS

PDF

70.7 KB Created: 2021-09-01 04:54:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7685d3c889d6c47871aa04634040fca4 SHA-1: 482bc977d3f666d6184c10b8d37fb26ef5c683b0 SHA-256: e94d08893cde6df775538c0fb36079ccae6a7011f0ad1259b2ea0173393381d3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous external URIs and links to compromised CMS uploads, indicating it functions as a link farm. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. The document body is heavily obfuscated and unreadable, providing no direct content clues.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://smidgel.ru/uplcv?utm_term=how+to+add+device+to+cast
    • https://lynnesnaturaltreats.com.au/wp-content/plugins/super-forms/uploads/php/files/53fbd4278209f67263fd98f08b8eee2c/31398298459.pdf
    • http://designbeginnings.com/upload/file/gejerisovedusotofixe.pdf
    • https://rhythmcprandfirstaid.com/wp-content/plugins/super-forms/uploads/php/files/e4b56a5804088bbde1d81a2e9bf9e7cd/53975636722.pdf
    • https://ovth.ch/userfiles/files/tiwufidurovafekejumuraler.pdf
    • http://yogathoitrang.com/quangbasanpham/app/webroot/upload/image/files/45917852689.pdf
    • https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a290da4a85e---54287323053.pdf
    • http://sictombbi.fr/ckfinder/userfiles/files/pajeletuj.pdf
    • http://kukubara.com/zdjecia/file/37475731056.pdf
    • https://livre-art.com/ckfinder/userfiles/files/12227927953.pdf
    • https://evermoral.hk/upload/file/1628159936.pdf
    • https://chiataiec.com/userfiles/Proj_Name/files/97496713747.pdf
    • http://isleford.com/filespath/files/20210804161435.pdf
    • http://fruitvita.com/files/files/46341005798.pdf
    • http://archissimo.eu/userfiles/files/59080242432.pdf
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/18e40e86df908bd0b708642dd5b720cc/7531625984.pdf
    • https://studio45.live/wp-content/plugins/super-forms/uploads/php/files/m6djgaacpi6oga13m2810knsd5/valegapukijovuxozexakutu.pdf
    • http://hyundai-dongdo.vn/images/files/22101923952.pdf
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9f9a8df375---moxuz.pdf
    • https://marosme.ro/hirek/file/wikunubusixo.pdf
    • http://ithalattagarantibelgesi.com/resimlerfiles/5815298208.pdf
    • http://aarogyamedico.com/userfiles/file/45373281383.pdf
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b556e403117---98336601692.pdf
    • http://lovewhereyoulv.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/688941d3fe215af1dcb28378983edc41/93533742324.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_off0000b8f3.bin
8cadb132c7c42bb790a2d406dacd42d660840f0ed967818af299f7388bd826b3
pdf-font-stream PDF embedded font (sfnt) at offset 0xB8F3 15024 bytes
font_01_sfnt_off0000ddd6.bin
fed16088f24d1ddee26650507e7f6b95d7e01f09896cb6093eaa831f75dc69f8
pdf-font-stream PDF embedded font (sfnt) at offset 0xDDD6 10256 bytes
font_02_sfnt_off0000f50d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF50D 16792 bytes