Malicious PDF — malware analysis report

Static analysis result for SHA-256 3edd3c437703b37e…

MALICIOUS

PDF

98.1 KB Created: 2021-07-13 07:22:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7e0842073afd7e816501e83be8e21ae5 SHA-1: 6ba3e78c982a6d359c02c09be6fedace548db166 SHA-256: 3edd3c437703b37e6fefed0220f0b02d4ae7aa23a9dcf0ff1ab00d37080116b8
224 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple links to external PDFs hosted on compromised WordPress sites, indicative of a phishing or advance-fee scam. The heuristics strongly suggest a lure for advance-fee fraud and callback phishing, aiming to deceive users with fake prize notifications or urgent security/billing issues. The presence of embedded JavaScript, though not directly analyzed for specific actions, contributes to the malicious nature of the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9922

Heuristics 9

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://avantkart.com/wp-content/plugins/super-forms/uploads/php/files/i54j0bmsl5g158s24ffivi9a0e/givubijif.pdf
    • https://marksiegeldds.com/wp-content/plugins/super-forms/uploads/php/files/703a3ba2542db6cb85ea1929f9ef5e72/52143113508.pdf
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c143ed43cac---60541111210.pdf
    • http://theettiaresmontreal.com/clients/f/f0/f03dfc1790708d0b03c48e9879ef2ea6/File/91999812387.pdf
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f7171c3262---49892755922.pdf
    • https://sfasg.jp/js/ckfinder/userfiles/files/23405757873.pdf
    • http://vincityhomes.vn/wp-content/plugins/super-forms/uploads/php/files/ouf6bkibnqrtfgb56p669bdtbq/filogi.pdf
    • http://3xlove.com/uploadfile/file/94590887515.pdf
    • https://www.cr-sdc.org/wp-content/plugins/super-forms/uploads/php/files/c961f9287dc59938faf92cead842ae1a/36761244786.pdf
    • http://historia-bfured.hu/userfiles/file/42181666187.pdf
    • http://millecolori.it/images/file/75974778509.pdf
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8eee8c35a0---29733634276.pdf
    • http://mebco.ru/images/file/kogupafugulijasunolumo.pdf
    • http://www.associatedomains.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080323b0bc61---rudakizimakotat.pdf
    • https://arihantgranites.in/wp-content/plugins/super-forms/uploads/php/files/jddikoamm5ef6p7nm08f4sihf1/miwaraluves.pdf
    • https://businessservicesuk.com/userfiles/file/najopekika.pdf
    • http://aiskreunion.com/clients/b/b4/b417c2091670ce0b0d78f4b231aea02c/File/15912806805.pdf
    • http://airholic.com/UpFiles/WebEditorFiles/file/52788559209.pdf
    • http://erpsamik.com/ckfinder/userfiles/files/mefomevosebisowomal.pdf
    • https://forkidsvietnam.vn/wp-content/plugins/super-forms/uploads/php/files/loqbhllrlpfjqdrp2f220v5uch/maxoselel.pdf
    • http://huron81reunion.com/clients/f/fe/feec28e48c841af8be4ad6373737a022/File/82312697841.pdf
    • http://iwilldoit.ru/uploads/files/files/60494064065.pdf
    • https://chezgregoire.fr/userfiles/48972192537.pdf
    • https://rhagro.com.mx/wp-content/plugins/super-forms/uploads/php/files/45550312ccc9ce33561346b8c4e08b2f/22071797027.pdf
    • http://fipjp.com/userfiles/file/tepixufupojoguwer.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=best+noise+cancelling+headphones+for+shooting
    • 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_off00011c84.bin
9afb7c1745c3d7f19d9d6449adcecc4c15c51624a0e6824afa14f82aa086be21
pdf-font-stream PDF embedded font (sfnt) at offset 0x11C84 10952 bytes
font_01_sfnt_off000135a7.bin
43e9a87dbe8ecaf5f334f2cf578ab70b36358ecd7e8bb4235956821d42b4412e
pdf-font-stream PDF embedded font (sfnt) at offset 0x135A7 17264 bytes
font_02_sfnt_off000162bf.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x162BF 16792 bytes