Malicious PDF — malware analysis report

Static analysis result for SHA-256 7692a0b351411976…

MALICIOUS

PDF

79.9 KB Created: 2021-06-29 22:57:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a1d7310765f9c9c2cac5b752af1c211e SHA-1: 1e0ae33365ea74207803be38258f752b69ac897f SHA-256: 7692a0b35141197670775a514735160fc31303e95a0f8203d050f0b9c71bf58f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many hosted on compromised CMS platforms, suggesting a link farm or phishing lure. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the structure and URL patterns are consistent with malware distribution or phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9781

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://pvsystreports.com/wp-content/plugins/super-forms/uploads/php/files/jtni3l1rhf7jf500c98cs6n9e2/38131276079.pdf
    • https://ecomassage.pt/wp-content/plugins/super-forms/uploads/php/files/vr4mtansk6d5g12te0mtf47oem/xalobukozu.pdf
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b17e16d2a34---timuxalitufalenipuwafefik.pdf
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099b6df38c28---43982571235.pdf
    • http://murphysbeads.com/clients/54316/File/81339632.pdf
    • https://poolpoint.be/uploads/file/44155441402.pdf
    • https://www.keystonecare.co.uk/wp-content/plugins/super-forms/uploads/php/files/9e63fd8b0c7535c363466208270d9773/69378609737.pdf
    • https://mimpishio2.net/contents//files/55147418642.pdf
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16076ee267cd32---65869733928.pdf
    • https://diarch.in/WYSIWYGImage/file/9561798090.pdf
    • http://alexanderkanevskyartgallery.com/clientMedia/file/tuzadosotuverab.pdf
    • https://andrejc.si/files/file/gamabularikusa.pdf
    • https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/83765c2f21ad2933ca9703a239973804/bixalexemotifegezoz.pdf
    • https://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608bf1734ebcd---bapawawasenopuzanig.pdf
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b98c8cce56c---9904803472.pdf
    • http://turexpert.md/userfiles/images/file/63370964034.pdf
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/8c5c3c4ffec5ba1913f29f42e2566f1d/3123081217.pdf
    • https://theemperorsoldclothes.co.uk/wp-content/plugins/super-forms/uploads/php/files/fnij4irmf8gi6klt70579v3nk1/59123082606.pdf
    • http://bluekeydigital.com/images/pic/file/webokigawonarataw.pdf
    • http://elmiraclassiccountry.com/wp-content/plugins/super-forms/uploads/php/files/82l8o5vevve216p0p361nuq476/42582944529.pdf
    • http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160d4e6fc63105---lomobagefej.pdf
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079b3ba9691a---wevutimo.pdf
    • https://blueridgelightingandcontrols.com/wp-content/plugins/super-forms/uploads/php/files/c8b85bc5a7f7e2f21c9c71ef407dac19/10238946847.pdf
    • http://dush-kz.ru/uploads/fck/file/sodijividubibiwotegifujiw.pdf
    • http://karmand24.ir/basefile/ehotel724ir/files/wulopamutakepitaxupuzu.pdf
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b42d23633b9---kedup.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=hudson+and+rex+123movies
    • 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_off0000bbec.bin
fb6b9f1d469c1444c776e52678032f3d6b35a972f8c29dabf3f142bd19d6b80d
pdf-font-stream PDF embedded font (sfnt) at offset 0xBBEC 16748 bytes
font_01_sfnt_off0000e736.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE736 16792 bytes
font_02_sfnt_off0000ff4d.bin
7cda28b0fba2059234807b3e600d12763f29b4497e5753ad0259434dc40864af
pdf-font-stream PDF embedded font (sfnt) at offset 0xFF4D 10868 bytes
font_03_sfnt_off00011879.bin
b4c5e2b204ed1a29b9d03f3ca51365d1e85c5bb98a97a48e1077e39ca44b39f1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11879 17340 bytes