Malicious PDF — malware analysis report

Static analysis result for SHA-256 c38eeadcd72b3d51…

MALICIOUS

PDF

84.8 KB Created: 2021-09-06 18:50:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e6848f515034c81584523af9fc4f1bec SHA-1: 4c34727c9cf29d6d96548c1988874139d2838514 SHA-256: c38eeadcd72b3d51015cacb87b2c98fff77b54ae49e52ace66790cc4db46d219
156 Risk Score

Malware Insights

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

The PDF file contains a link farm pointing to numerous URLs, many of which are hosted on compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure and URL patterns suggest a malicious document designed to lure users to external, potentially harmful, content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e43dad0ddf8---10277765612.pdf
    • http://angelcabrera.com/FCKfiles/file/riminawekafufobawin.pdf
    • http://timelessmebel.ru/wp-content/plugins/super-forms/uploads/php/files/8c719159082d0b8b4ed4e6bfa5d4c542/babanokibuxijunikom.pdf
    • https://hobbes-group.com/upload/files/puxodisagorolojufifef.pdf
    • https://dienlanhhonganh.com/images/pic/file/47488816713.pdf
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/16087367b38037---91052664478.pdf
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/16135f99a9f843---rijewesuvogujokezawivuv.pdf
    • http://karate-talence.com/newsite/userfiles/files/lipuwopu.pdf
    • http://saigonford3s.com/uploads/2021-08-07/images/files/43723244686.pdf
    • https://vaytieudungtragop.com.vn/wp-content/plugins/super-forms/uploads/php/files/e87cj1gkckv93h5tuj51q5dv6i/vajupiw.pdf
    • https://brahmagnanam.org/fck_uploads/file/ralovuwigezatusaze.pdf
    • http://www.veronicaneal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/160f295f1ab14e---fiteragiwize.pdf
    • https://christembassyromford.org/wp-content/plugins/super-forms/uploads/php/files/e1c6cd7af18c5b7981b4f7e2bc50788b/32091127049.pdf
    • http://villaturri.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071cbb3e1a05---xesidulabokugedar.pdf
    • https://www.lindopoint.it/wp-content/plugins/super-forms/uploads/php/files/e2164f73e276d892a13fd90bba86aca7/lebolawejox.pdf
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f00ad0ed75---71914135335.pdf
    • http://modnyi-buket.ru/uploads/files/jogukawi.pdf
    • https://www.heracles-hotel.eu/wp-content/plugins/super-forms/uploads/php/files/nfn3mon4r9nnf1duug4k50cqak/kexobefefulapegag.pdf
    • http://iphysiology.ru/upload/firezadulaf.pdf
    • http://emilybarnes.com/DEVELOPMENT/VERSIONED/emilybarnes/trunk/sites/default/files/file/81503086923.pdf
    • https://memoservicesrl.it/file/gefavujawovozurikelon.pdf
    • http://nessium.fr/userfiles/file/62403885874.pdf
    • http://nfc-lampang.com/user_img/files/lizuworot.pdf
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/1611b092f55548---gunamusisisiwoxeti.pdf
    • https://virtrade.gr/userfiles_lybo/file/sepalowepanefezez.pdf
    • http://katyababash.com/images/uploads/file/11637446308.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=math+integers+worksheets+grade+7
    • 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_off0000e2a8.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE2A8 16792 bytes
font_01_sfnt_off0000faba.bin
3b184b46bf47ccef17abd86296a4dc37e2058906fda5cb61c3b5067c9450422b
pdf-font-stream PDF embedded font (sfnt) at offset 0xFABA 19084 bytes
font_02_sfnt_off00012caf.bin
829e7ab16650a1dc3960d499bee4d3dd012929c0ff466aa6cf0ad3131fb0abde
pdf-font-stream PDF embedded font (sfnt) at offset 0x12CAF 10700 bytes