Malicious PDF — malware analysis report

Static analysis result for SHA-256 9073eee41226b9d8…

MALICIOUS

PDF

88.2 KB Created: 2021-06-25 12:05:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f954f385b844bc460267bd4d819f05a2 SHA-1: 735cad06e814078f51d9fd863c13b2481b89654f SHA-256: 9073eee41226b9d8414e3e3ed76857d24eb604326bcbcdc1380c0f31196cda01
156 Risk Score

Malware Insights

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

The file was detected by ClamAV as Pdf.Phishing.Trojan and an ML classifier flagged it with high confidence. The PDF contains numerous external links, many pointing to compromised WordPress upload directories, suggesting a link farm designed to redirect users to malicious sites. The presence of these links and the overall detection profile indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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 https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/1deu3gi2itba1vrrjfn56phcr3/2370550266.pdf
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082e88e9acc2---32716700483.pdf
    • https://dm288.rs/slicice/file/tufofezufuropalu.pdf
    • https://accuratesearch.com/userfiles/file/36474690789.pdf
    • http://www.kmclogistics.com/wp-content/plugins/super-forms/uploads/php/files/44f0b9162c7ff63f9ce28f3ca57f4448/ditonatubexobego.pdf
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609afd270c830---suwelanomoxubopot.pdf
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/160c8c30d2b59d---69378708664.pdf
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a6e07fd8771---mojojawejiragi.pdf
    • http://iamsong.vn/uploads/files/zibukobufomegipuvova.pdf
    • https://cwlighting.com/wp-content/plugins/super-forms/uploads/php/files/26e7f1ad008c84b982623e1dbd73a1ee/96907424358.pdf
    • http://alphabodysupplements.com/newerac2c/userfiles/file/kufabirimosiju.pdf
    • http://chocolatycakes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608864fae9061---lunovegidabalu.pdf
    • http://alpinedelhi.com/userfiles/files/97641645574.pdf
    • https://www.ideaklinikkadikoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b36ccbbe8c7---bifobelaxega.pdf
    • http://chelseacarpet.com/ckfinder/userfiles/uploads/47309866386.pdf
    • http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081923ed793d---zowumubavezisidabiwofota.pdf
    • http://mwflower.com/upimagesfile///60535557616.pdf
    • http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095a02333590---rulekel.pdf
    • http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/1076fdd7f0f1b427aa0337d5ebd46c1e/nekanamosizodevamubiwuje.pdf
    • https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/4jkk0nq4opo60725id9kcn4j7g/lolepatuwolunuvereg.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=stone+mountain+map+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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c32d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xC32D 16792 bytes
font_01_sfnt_off0000db44.bin
f1ad2815a73f6849f549c117a420e62e007e71a3481723d9a647067ea627f83b
pdf-font-stream PDF embedded font (sfnt) at offset 0xDB44 10520 bytes
font_02_sfnt_off0000f332.bin
6847dd78b2d9dca23cbed066ec4d9fe0ff7ab41b29640a46c0a1038aa925508f
pdf-font-stream PDF embedded font (sfnt) at offset 0xF332 19368 bytes
font_03_sfnt_off00012285.bin
d8205b0b82efd5ffa305698719220d24c2e5a7be2b4bff66922f3dad6cf08503
pdf-font-stream PDF embedded font (sfnt) at offset 0x12285 18600 bytes
font_04_sfnt_off000140a6.bin
5397ee08df2b5ee0a2d3ba42df4986a7af4dd258784b7a4910520b8f68b4a1f2
pdf-font-stream PDF embedded font (sfnt) at offset 0x140A6 4956 bytes