Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd07c24df8e4a64a…

MALICIOUS

PDF

106.7 KB Created: 2021-07-08 01:21:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c218c6d525936e94023fe83877c9727a SHA-1: a26b991c887b293a1e878b2a6d26dfcf6a3dc157 SHA-256: fd07c24df8e4a64a6cad57691d17a7f1a0599a0f58fb448d1059107125dcdc40
156 Risk Score

Malware Insights

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

The ML classifier and ClamAV both strongly indicate maliciousness, with ClamAV identifying it as a phishing trojan. The PDF contains a link farm pointing to multiple compromised websites, likely designed to redirect users to malicious content or phishing sites. No scripts were extracted, but the structure and URL patterns suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

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.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/8kkhjldh6gf703mj4p7749pgu4/zezogojorarikogur.pdf
    • https://travolution.travel/wp-content/plugins/super-forms/uploads/php/files/1530417be00d1352ae2f574950500beb/65798753174.pdf
    • http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ac0a6d4c80---nobizijaxuwuzetegefijeji.pdf
    • http://dodici12.ru/wp-content/plugins/super-forms/uploads/php/files/r5s4jdspgrgs3cic19p0ob32q3/nufufaxum.pdf
    • http://gavinlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/87632726549.pdf
    • https://twr1115.net/files/fckeditor/file/83129493912.pdf
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160781205a0592---dakifidexurupujodovexa.pdf
    • http://donateagift.eu/userfiles/file/19939832658.pdf
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072127549f1e---kimuxasu.pdf
    • https://moma-restaurant.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083281168d84---mekezoxisasa.pdf
    • https://groupunsur4.com/contents//files/92382313352.pdf
    • https://www.heainc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc84eefc61---waworon.pdf
    • http://alliance-ltd.com/userfiles/24484459282.pdf
    • https://hotelristorantenovecento.it/wp-content/plugins/super-forms/uploads/php/files/6e06675b4c2ee828c5c59001169e645d/gomerabimisubafabivapuri.pdf
    • https://weeb.nu/userfiles/file/54920775993.pdf
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/1608c7f96f19a3---zivekuzap.pdf
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6a48e222b4---xizevazafaboputov.pdf
    • http://debden.org/userfiles/file/40142911837.pdf
    • http://anoh.net/pds/userfiles/files/nawonimifulunemudo.pdf
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1606eb8f7d71ad---wavipe.pdf
    • http://avtokit116.ru/!upload/files/tawulifumojimuwidis.pdf
    • http://bradleyhillsapartments.com/demo/uploads/contents/file/bobawikuvoderatexinafodu.pdf
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/160cd0340ab422---sagevazuponutilebaborur.pdf
    • http://bygreenpure.com/userfiles/file/mofigizopil.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=janome+1000cpx+manual
    • 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_off00013aba.bin
1967b31fffa5d7b6690a3fe32001c6504276022ee203a322296bdc505cac1a04
pdf-font-stream PDF embedded font (sfnt) at offset 0x13ABA 10444 bytes
font_01_sfnt_off00015274.bin
a68ba1fac310a00552a57d7a001407bb0a0b98616eab1e7f8b35b301493486db
pdf-font-stream PDF embedded font (sfnt) at offset 0x15274 20752 bytes
font_02_sfnt_off000185b8.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x185B8 16792 bytes