Malicious PDF — malware analysis report

Static analysis result for SHA-256 0980767baaac742b…

MALICIOUS

PDF

87.2 KB Created: 2021-08-03 01:04:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: bbfdba75bcbd37e45e1a2ef221601cd7 SHA-1: 9f53ad0841492cca95278e1cd1914c5f9a0180b2 SHA-256: 0980767baaac742b3d248b40beebe8e75cb324748630229f9a2713829faf05ed
164 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS uploads or disposable hosting, indicating a link farm designed to distribute malware. The presence of a 'Download' button heuristic further supports the lure-based attack pattern. ClamAV detection and ML classification confirm the malicious nature of the file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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 http://www.scea.edu.mn/ckfinder/userfiles/files/dogosenalitov.pdf
    • http://ansing.nl/userfiles/file/71826192947.pdf
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070348d5703b---faxunilapasa.pdf
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/16096cbd80dfc7---83848295129.pdf
    • http://stroynerud-sm.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606c79a0b94cd---76436651947.pdf
    • http://aotwresort.org/ckfinder/userfiles/files/98575896147.pdf
    • https://oliogalanis.com/file/xoduvovofubomomej.pdf
    • https://consurs.ro/ckfinder/userfiles/files/nipanekirifo.pdf
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b591faf7a6---guwatisesivatagive.pdf
    • https://kermoulin.com/userfiles/file/64639919607.pdf
    • http://biotop-zamosc.pl/userfiles/file/jiloxaginekowamipa.pdf
    • https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/0da658dfb793a646d9d784ac06e46443/vebokaxugabawibetajejur.pdf
    • http://allprintusa.com/admin/images/file/94837281452.pdf
    • http://poslovniimenik.net/firme_data/files/riwotoxizegatisatenisen.pdf
    • https://tenfci.org/userfiles/file/farip.pdf
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c22dc2180ee---21495890288.pdf
    • http://almar-bus.pl/userfiles/file/27320811421.pdf
    • http://buzmakov-ua.ru/admin/ckfinder/userfiles/files/36034859255.pdf
    • http://koovappadyscb.com/ckfinder/userfiles/files/texulibaj.pdf
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bf4b804070---vekuvozivabevat.pdf
    • http://tamlaproject.com/userData/board/file/49850072275.pdf
    • http://brandnewgoods.net/userfiles/file/33272139425.pdf
    • http://hatowo.com/app/webroot/uploads/files/45789499700.pdf
    • https://viajespereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c56c50e3d09---tejuzixetopodix.pdf
    • http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085e433238dd---dolukojugomaveribaf.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=evil+dead+4+tamil+movie+download+isaimini
    • 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_off0000f074.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF074 16792 bytes
font_01_sfnt_off00010886.bin
43b5d2db486ec92ff5c947c0f724a5f59507b22520ab103a585ea4b5e14ac0f1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10886 17092 bytes
font_02_sfnt_off00013506.bin
76c6b4706ae340a34261214cc44b278ca24f2b9fd2fcca083c7e70270de6a0f0
pdf-font-stream PDF embedded font (sfnt) at offset 0x13506 10524 bytes