Malicious PDF — malware analysis report

Static analysis result for SHA-256 618adb113a638572…

MALICIOUS

PDF

142.8 KB Created: 2021-07-04 04:01:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e4c6609c32812ae35c720af8d99afd6d SHA-1: 1831b7d69fb0cf6866cf01b20ed61895ad6c4fa0 SHA-256: 618adb113a6385725c8da14f97eeecf63c1a75afae45d1028c52684e55f7f67c
156 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lure users to malicious content or downloads. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

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 http://fernandopelosini.it/userfiles/files/bodaxesagigog.pdf
    • https://www.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/feuun7vg3uq0ogfl6lf4slhmmf/52369036481.pdf
    • http://haciogullari.com/depo/sayfaresim/file/talirepukexe.pdf
    • http://midel.me/userfiles/file/wulujoperigopepup.pdf
    • https://eandjfamilyhealthcenter.com/wp-content/plugins/super-forms/uploads/php/files/da4ef1747b914fc2af42bb6553b7c1ef/83564820547.pdf
    • http://ctyrkolky-gamax.cz/data/dokumenty/nunepimekuguvopuzede.pdf
    • https://study-go.info/wp-content/plugins/super-forms/uploads/php/files/65ad906003160556728e472f16cee010/wuwidenipirolizasok.pdf
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609842e2ae025---10042923564.pdf
    • https://htfcompact.com/wp-content/plugins/super-forms/uploads/php/files/6df9591313c9809e063db5e98bab4e06/wofewaw.pdf
    • https://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/3da65ma64ghe1tpjsitre3ak02/ledetidoxilusu.pdf
    • http://nutranghongngoc.com/media/ftp/file/96336770120.pdf
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/160d60d73ba476---76224121761.pdf
    • http://hndgyl.com/v15/Upload/file/2021626055346891.pdf
    • https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/8901df8696ce4577f67cd2696368d677/pasobezifudowumuwuwotal.pdf
    • http://relocationservicesgroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071b686d5f2a---11393357058.pdf
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/2fd95872ceb5c0ec2a77525ecd8f012f/zerezakedusixanisonub.pdf
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160acbc79d6aa8---27924549614.pdf
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f1e8ae7ff1---91251863508.pdf
    • https://www.blackandwhite-salon.com/wp-content/plugins/super-forms/uploads/php/files/94ed682d5abcd7bac650c204505bf08d/27848039688.pdf
    • http://aeskulap24h.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a7dee84c3b7---32130729026.pdf
    • https://teenvolunteerhouston.com/wp-content/plugins/super-forms/uploads/php/files/e65d21fb85594cf62ccb545628e6bbae/sidamezabufipi.pdf
    • http://tnslib.net/userfiles/files/bolefokevakakoguk.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=2b+revealing+outfit+unlock
    • 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_off0001cea2.bin
83d76ab4754f234ebb728c3566f51cc9989ee703a8fb56c132518671c3d00f43
pdf-font-stream PDF embedded font (sfnt) at offset 0x1CEA2 17764 bytes
font_01_sfnt_off0001fcbb.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1FCBB 16792 bytes
font_02_sfnt_off000214d2.bin
89562c10b2353be94961f8e55bb498b481d7c274b46b24857bbfbe172c5d8276
pdf-font-stream PDF embedded font (sfnt) at offset 0x214D2 10764 bytes