Malicious PDF — malware analysis report

Static analysis result for SHA-256 069de2cb2fc3decf…

MALICIOUS

PDF

91.9 KB Created: 2021-06-25 23:52:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b96d641e9007520495375a0c7e5af1a3 SHA-1: d25219b0cf60b27587eb5ceb0b14546e56ecb9b1 SHA-256: 069de2cb2fc3decfa9bc0c3cde2730a6f40654755892c5e15b6fd2dd81301cb6
176 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to compromised WordPress sites and other disposable hosting, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest a phishing or trojan payload delivery. No scripts were extracted, but the structure of the PDF itself is indicative of a malicious intent to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9932

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://coretry.ru/uplcv?utm_term=digital+image+processing+projects+pdf
    • https://wulf-sanitaer.de/wp-content/plugins/super-forms/uploads/php/files/1dh29q6qcjncoqdvhkjmp2f32l/vazavup.pdf
    • http://tea-ra.com/user_data/upload/save_image/files/73708368477.pdf
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/1qe1uv2fjrvq28kp9m5j6cgjr3/jufalatowofifasigusatiw.pdf
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16070d3be501d6---xulavoxe.pdf
    • http://ggmtc.net/userfiles/files/34113292639.pdf
    • http://worldnaturalfood.com/image/upload/File/72653546420.pdf
    • https://auto-rujo.com/images-editor/file/juxisidulag.pdf
    • https://xo-sound.ru/userfiles/file/77540160938.pdf
    • https://www.budgetskemaet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160ab3a7cde540---xeraro.pdf
    • https://mls.lighting/wp-content/plugins/super-forms/uploads/php/files/ac667b0dde3c1c7dbadc44cf13f47775/37694217841.pdf
    • http://wsm.hk/images/uploadfiles/file/11566476599.pdf
    • https://www.chinacimctrailer.com/wp-content/plugins/super-forms/uploads/php/files/9c620c9c97b9c47450a92289949e8896/15602793033.pdf
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/1606fbd3e18866---73000684405.pdf
    • https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/kme2kbl9ips6fomf1c7lb54q1e/zituvamojubuxagokiwo.pdf
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/1606f2ae0a8743---wonenejimaterejeder.pdf
    • http://enjoyisagenix.com/ckfinder/userfiles/files/pudurunonobibumenavu.pdf
    • http://arcenevents.nl/site/upload/files/69126578984.pdf
    • https://vernadoc.com/wp-content/plugins/super-forms/uploads/php/files/5c4d5e10b43557fa30c9565b04328994/budafepofiralas.pdf
    • https://ilc.ua/wp-content/plugins/super-forms/uploads/php/files/nhlnubg69dk328sfsh37m9av36/60374896118.pdf
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1609cfa965ac6b---gubisodarofukaredupufivol.pdf
    • https://pointsourcegroup.com/wp-content/plugins/super-forms/uploads/php/files/92f27433a0df630cd3f07cd7c0f365cd/jofipob.pdf
    • http://cnc-soustruzeni.cz/files/file/kakoputiwaz.pdf
    • https://aneri12.eu/res/file/91866879260.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9b7.bin
9d3be2250578cc1f0b12469069d0bb025a87c8e0a68301940494e548424c450d
pdf-font-stream PDF embedded font (sfnt) at offset 0xE9B7 17976 bytes
font_01_sfnt_off000118fc.bin
c40ca8b655c3e0c30df641a0786855e9f094abdfa4cdea9242dbf9380e014885
pdf-font-stream PDF embedded font (sfnt) at offset 0x118FC 16664 bytes
font_02_sfnt_off00012fcd.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12FCD 16792 bytes
font_03_sfnt_off000147e4.bin
e439f546097ca83fcbf243d26c24b674c061f3c093c073d9f72714ec2a2ed2a3
pdf-font-stream PDF embedded font (sfnt) at offset 0x147E4 11092 bytes