Malicious PDF — malware analysis report

Static analysis result for SHA-256 03bfe75f51018fd0…

MALICIOUS

PDF

88.7 KB Created: 2021-06-29 09:12:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5bd8f2624310d80752fd28e7cb4cc7ad SHA-1: 6f2c367a43409cda140cafaae7e4bf9decccc5f3 SHA-256: 03bfe75f51018fd0b8b60f2113cd945061df82f78de82ebf983121fab062f4bb
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous links, many hosted on compromised WordPress sites, which likely lead to malicious content or further infection vectors. The document body is unreadable, but the presence of a link farm on compromised infrastructure strongly suggests a malicious intent to redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://medvor.ru/uplcv?utm_term=after+bba+can+i+do+mba
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096fb4452366---nunugafa.pdf
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075d9d273f65.pdf
    • https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160afb83618b19---lowabupivusi.pdf
    • https://edukiya.com/wp-content/plugins/super-forms/uploads/php/files/180d3756d05557df206bdeb25cec68be/wubotuwupidazuzakuji.pdf
    • http://hiddenforrest.net/clients/76790/File/fedulolir.pdf
    • https://cape-electronics.com/media/file/raxenepusidiliziruze.pdf
    • https://fairtradeportal.pl/userfiles/file/sisidukakub.pdf
    • https://batikatravels.com/userfiles/file/tulosu.pdf
    • https://binhruamuinanobac.com/wp-content/plugins/super-forms/uploads/php/files/ktt36bs2bbuborqlrqvpctn25o/tagowivolewezofikufapoti.pdf
    • https://nowbali.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/1608a95e6bbf3b---godubaganadode.pdf
    • https://www.basur-tedavisi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160804f4a905da---sarikukorifidajizo.pdf
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607babb9b8bc8---mapikupututovozax.pdf
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160d4fe2ca4148---kubemi.pdf
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e231db7a71---bolakobaxuguru.pdf
    • http://111-orte.de/testarea/cwsCMSlight/media/files/zagidoboz.pdf
    • http://albatrossmrn.com/konadnew/userfiles/file/nakugusoba.pdf
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fe10c15264---86368335754.pdf
    • http://ongnuocdenhat.com/upload/files/kekazixigewub.pdf
    • http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/36ab2b6f9171f7797890d98d9704ccbc/58581317842.pdf
    • http://jpmoto.biz/upload_picture/40903707390.pdf
    • https://cornerstonelaw.eu/userfiles//file/nugexijov.pdf
    • https://gauravkankariya.com/wp-content/plugins/super-forms/uploads/php/files/061ah2cleqil3kscdkoah744j7/supozol.pdf
    • http://dfh-consulting.com/userfiles/file/61911092727.pdf
    • http://miamiwars.pl/wp-content/plugins/super-forms/uploads/php/files/26a1bd1422594d11dfda59fa0b5554ab/sowavejokirepag.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_off0000f647.bin
aba947f6b4612bd0f93548012e8392764c973a8b9040ff04660543cf42e5cec6
pdf-font-stream PDF embedded font (sfnt) at offset 0xF647 10544 bytes
font_01_sfnt_off00010e4d.bin
1d91b2711b1008a280351ac6f4cabb6ddc5bdef799c59895b9fa28b43c7db610
pdf-font-stream PDF embedded font (sfnt) at offset 0x10E4D 17540 bytes
font_02_sfnt_off00013c4e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13C4E 16792 bytes