Malicious PDF — malware analysis report

Static analysis result for SHA-256 45a426bae3bb0184…

MALICIOUS

PDF

83.4 KB Created: 2021-07-27 19:15:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ea99ba7414c17de3808e79645841c815 SHA-1: f65037a9576533b4ebce62f1d9eceb63606b102b SHA-256: 45a426bae3bb0184028b3e30c8c581935a5fc856d8091f7b4ea53ab8d68e8e47
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised CMS upload directories, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://valleypainclinic.org/userfiles/file/fifasuvoso.pdf
    • http://tipsclubcr.com/campannas/file/kixuvinowovotuma.pdf
    • http://immodraft.nrw/images/architekten_agentur_images_/file/vaxuxowewavatakilusa.pdf
    • https://cedarcreeksauce.com/wp-content/plugins/super-forms/uploads/php/files/9afe8851365ea19a0993f24437e25e67/nipinenozazatiwupoviselon.pdf
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160869ed52ee3b---mafelaje.pdf
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c5fde3c96ac---jarujewakitaxosizifevap.pdf
    • http://thevelascofamily.com/clients/11614/File/xazarozuvagopikoworusupi.pdf
    • http://mikailang.net/userfiles/file/20210509031744_495031648.pdf
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160f70dab5c52f---tibebiremijidi.pdf
    • http://jinanxintiandi.com/userfiles/files/97281169146.pdf
    • https://ltanimalpark.com/wp-content/plugins/super-forms/uploads/php/files/73161084a3c29e67be5773841134cf6e/70278204489.pdf
    • http://gostinica-domodedovo.ru/files/xerezekowipegaranunubo.pdf
    • http://www.k-24.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c6925afda6---jeziratisirerof.pdf
    • http://lamachine.nl/userfiles/file/xunadajetijorabo.pdf
    • https://muratay.nl/userfiles/file/rewaxobageviso.pdf
    • https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/msvg04q1fmao9dm1cnt6c5raib/bagemadapozigusugesufolip.pdf
    • http://melhi68.com/clients/69549/File/ronir.pdf
    • http://witnesstherealist.com/wp-content/plugins/super-forms/uploads/php/files/9ec8a36a710803ad3e019317c87f84f2/robilisejexezud.pdf
    • https://vickers-electronics.co.uk/wp-content/plugins/super-forms/uploads/php/files/31a7554a5ae48bce4c5c619b6b8c9460/pibikonu.pdf
    • http://gryfarmerskie.pl/pliki_wyswig/files/93909421883.pdf
    • http://nusratali.com/userfiles/files/vutodijoxiliri.pdf
    • http://qhzs88.com/admin/fckeditor_upfiles/file/2021072402321080554.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=cat+goes+fishing+free+download+2021+pc
    • 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_off0000e0ae.bin
e7a06c153ab28be10494be9c5f279a0647fa59f19452a58de7e63cb746b4bd19
pdf-font-stream PDF embedded font (sfnt) at offset 0xE0AE 17064 bytes
font_01_sfnt_off00010cff.bin
85c91219ccb9d94e09892ff036d656eb43b08cf7f9f1d9f980ae0336ceb79b15
pdf-font-stream PDF embedded font (sfnt) at offset 0x10CFF 11312 bytes
font_02_sfnt_off0001277f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1277F 16792 bytes