Malicious PDF — malware analysis report

Static analysis result for SHA-256 edef7fd8b8c8caa6…

MALICIOUS

PDF

84.9 KB Created: 2021-07-01 12:45:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9683dd4296a8eac2d3bbf0f41547f9f8 SHA-1: c100bca5038f9acf39f0de0bb3cb503e001c10f9 SHA-256: edef7fd8b8c8caa6868ec00b5cca87d2a28dfc42ca3fe4b50db98a7621891b23
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many hosted on compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7df18568b0---vejulekurikojodoperore.pdf
    • https://nobleanimalsanctuary.org/wp-content/plugins/super-forms/uploads/php/files/tmp/86170565123.pdf
    • http://cn-junsheng.com/upload/file///2021620155115295.pdf
    • https://www.couleurs-et-jardin.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16083576e4680d---xusese.pdf
    • http://xboxheerlen.nl/userfiles/file/54828254127.pdf
    • http://marinapogon.pl/upload/file/92511441393.pdf
    • https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/dd9c0b0512a7ae927fcf3980f3b3d459/40547994862.pdf
    • http://arohitourandtravels.com/userfiles/file/82696760205.pdf
    • http://lowndes85.com/clients/d/d3/d39312ffd46aa2fbcc4e4de04d96a17f/File/vajodobewu.pdf
    • http://kleinschaden.expert/userfiles/file/33770440820.pdf
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160755daed9058---pevisaxa.pdf
    • http://askort.pl/Upload/file/nufawigigekax.pdf
    • https://aitalk.vn/upload/files/fugosok.pdf
    • https://burragebrothers.com/demo/jolie/beta/userfiles/files/93432128731.pdf
    • https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609451bc037d7---70652247241.pdf
    • http://piau-po21inn.com/CKEdit/upload/files/gufabifidiwogifon.pdf
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bfb0797df2---dujufu.pdf
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/1606cfec6f3d51---3996957765.pdf
    • https://rosemonttherapy.health/wp-content/plugins/super-forms/uploads/php/files/ilkp03eeht7i4qol87slh08hi0/58768267959.pdf
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608596302d0bf---kuwej.pdf
    • https://www.litesourcenc.com/wp-content/plugins/super-forms/uploads/php/files/ba22bb05fed846423ddd47cb2587367b/67701024080.pdf
    • https://www.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/5dd52075c57b6eab4b3fe5bc760ab859/28178111614.pdf
    • https://youstore21.com/wp-content/plugins/super-forms/uploads/php/files/eaac804fcf5577133e5fef22304e13ff/fanaman.pdf
    • https://cwlighting.com/wp-content/plugins/super-forms/uploads/php/files/677e72e5084324bafb028b5b9a17da88/81630287309.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=step+and+a+half
    • 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_off0000eb76.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEB76 16792 bytes
font_01_sfnt_off0001038d.bin
0e12081c577282d617b89b7933551fe2749f20126cd6b1257113fce27b440ebb
pdf-font-stream PDF embedded font (sfnt) at offset 0x1038D 10192 bytes
font_02_sfnt_off00011a4b.bin
bb44113d8293527473593eb24ffc94e80b6547edd22adfd20e1c84788081e511
pdf-font-stream PDF embedded font (sfnt) at offset 0x11A4B 17028 bytes