Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c298c920cd58bab…

MALICIOUS

PDF

79.0 KB Created: 2021-07-26 00:51:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 67f36963937743a188755e6ee6bb30fe SHA-1: 2d352900c62397571df2ee811b58830a6cac3da7 SHA-256: 7c298c920cd58babd13ae782fe333ee8ad3ce26fee125ff6286e5550d7a7f878
156 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. Heuristics identified it as a link farm pointing to compromised WordPress upload storage and disposable hosting, suggesting an attempt to distribute malicious content or phish users. The embedded URLs, while many are benign, are part of a larger pattern of redirection to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f9825322511---lopajevesuburilivogi.pdf
    • http://www.xpresswedding.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cc8574356b---99323906354.pdf
    • http://chromavials.com/d/files/57312214852.pdf
    • https://beatmuellerfoto.ch/userfiles/files/60188479174.pdf
    • https://specialbrands.gr/wp-content/plugins/super-forms/uploads/php/files/891263fd5981357a4968fc30d2dd4f84/68594773278.pdf
    • http://twfindia.in/userfiles/files/77527846251.pdf
    • https://toppelletmachine.com/d/files/telavubuloramemokeba.pdf
    • http://autosklo.sk/pictures/file/kosaruzixosawusaruguzit.pdf
    • http://dancephoto.ru/userfiles/files/17979416892.pdf
    • http://tipsclubcr.com/campannas/file/faxefusitelafelum.pdf
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/cb3ec419e274b0e24b576afdd263283a/90494278738.pdf
    • https://mldom.xyz/web/img/podborky/files/63073498255.pdf
    • http://kiuruvedenlukio.fi/tiedostot/file/34256819738.pdf
    • http://mjsolankifoundation.com/fck/imagesfile/sapofekowojixabitarabari.pdf
    • http://frankslawfirm.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/rumidoxenavigenalefum.pdf
    • http://escuelasfutbol8.com/docs/files/76717394434.pdf
    • http://trimblehighalumni.com/clients/84492/File/xugamegazimu.pdf
    • http://111-orte.de/testarea/cwsCMSlight/media/files/lawugepalosoludib.pdf
    • http://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cba8a68e4d8---dufitok.pdf
    • http://qca.ch/userfiles/file/folaputad.pdf
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160a0f2b0cafb3---70129624148.pdf
    • https://www.cibaospalaser.com/wp-content/plugins/super-forms/uploads/php/files/lvmrec1mloijprhvl6okgf8m5q/pekafabapikupa.pdf
    • https://bettyloupaints.com/userfiles/files/roxavizuxedavoduwabiseva.pdf
    • https://zanhotel.ro/beficientconsultingFiles/file/tojitewegegawe.pdf
    • http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dd849da68bc---5542223742.pdf
    • http://abpaluso.com/upload/file/bekositolevegir.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=efecto+leopi+para+ellas+pdf+gratis
    • 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_off0000d0fc.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xD0FC 16792 bytes
font_01_sfnt_off0000e913.bin
631d82dfd62f4e007a09c0d825acbacc0228b3d4aba874ddcb901d111943d1e2
pdf-font-stream PDF embedded font (sfnt) at offset 0xE913 10676 bytes
font_02_sfnt_off0001016f.bin
1ea3b117f0eb9b9b3448d4f91065ae692a4cb1a8620cd7f12d940e92fecf4226
pdf-font-stream PDF embedded font (sfnt) at offset 0x1016F 17644 bytes