Malicious PDF — malware analysis report

Static analysis result for SHA-256 abe41d0beefb367d…

MALICIOUS

PDF

80.7 KB Created: 2021-09-05 01:51:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d36e898716823f26ec9a6029eb6b7e99 SHA-1: 2755764779a52b947db34dedbed9de9ac0afad59 SHA-256: abe41d0beefb367dd07d2786caf55e19829123410618c4bb48c0d84aba14a830
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ClamAV and an ML classifier. It contains a link farm with numerous URLs, many pointing to compromised CMS uploads or disposable hosting, suggesting a phishing or malware distribution scheme. The document body is unreadable, but the heuristics indicate a deliberate attempt to obscure the malicious nature by using a link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://medica-eg.com/userfiles/file/82792088097.pdf
    • http://shopsuathientu.com/uploads/userfiles/file/pogefoduzulemetevoxida.pdf
    • http://yaqeen-eg.com/userfiles/file/namarow.pdf
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/6849c5635c4e18633c45a799dcb14e85/rotuzuwomize.pdf
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608cf536a6c3b---43629808786.pdf
    • http://locthanhwindow.com/img_duhoc/files/49726236065.pdf
    • https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/dsjge89uc2dvsn0khkt1h40uu8/rilulofejijole.pdf
    • http://springhs1988.com/clients/a/a7/a70db2535ed58991dd9724faf9b165d0/File/74381382862.pdf
    • http://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/e15c31b19ed92fe6e05f1baf9f045537/2289210835.pdf
    • https://bandai-k.com/userfiles/file/minusazijufulipe.pdf
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/1609c724f6eb9c---pipozitazavesajez.pdf
    • http://papierplus.pl/userfiles/file/37044328086.pdf
    • http://lushexperiences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160712ccecbd6e---nunisuxaba.pdf
    • http://www.nandomoraes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16078170d31696---93665604297.pdf
    • http://www.homefacelifters.com/wp-content/plugins/super-forms/uploads/php/files/8bedbf993abc55dd737138a7cd656f1d/pufim.pdf
    • http://bjsprt.com/uploadfile/file///2021052917560093.pdf
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160d845c875175---21322920743.pdf
    • https://lacaune.hu/userfiles/file/23354668942.pdf
    • https://www.tangelo.no/wp-content/plugins/formcraft/file-upload/server/content/files/160923f0ec534d---dojorovemizitusew.pdf
    • http://kamnitikamini.si/upload/files/nisimor.pdf
    • https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f11f899a90b---52151346474.pdf
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/7e720cba61b04de020ae89353aa574c9/4067662124.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=fundamentals+of+electrical+engineering+mcqs+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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d683.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xD683 16792 bytes
font_01_sfnt_off0000ee95.bin
62cff9d8a3558b29a482b1c31281789c3e7db7c53e1e2c5a679be895a2ec7600
pdf-font-stream PDF embedded font (sfnt) at offset 0xEE95 17232 bytes
font_02_sfnt_off00011b46.bin
28e5775f35fb10ab5aa642d37018ade41b71562b4d40e5e3e2f32ce2fc7cfefe
pdf-font-stream PDF embedded font (sfnt) at offset 0x11B46 11188 bytes