Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f662a60dd3a2de9…

MALICIOUS

PDF

103.6 KB Created: 2021-06-30 06:34:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c9a3ec5817a3ec438d6ec8e3af080638 SHA-1: ff4c79b0d5d95bcc7fd5905c911868c87488d2a3 SHA-256: 7f662a60dd3a2de95d9956b96719b40836eb40f4984b18783e3030d7807216da
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, with many embedded URLs pointing to websites hosted on compromised CMS platforms, specifically using the Formcraft plugin for file uploads. The presence of numerous distinct hosts and the use of UTM parameters suggest an attempt to distribute malicious content or phish users through a variety of lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9919

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6a60611127---25316117825.pdf
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/160cf377f1e0bf---36986190436.pdf
    • http://maduraigarlandshop.com/userfiles/file/pokadixiwisokutonin.pdf
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a73b2fea01f---86298550907.pdf
    • http://biirbeh.mn/images/content/file/rajulido.pdf
    • http://starlightcelebre.org/clients/4/43/43e9139217482d7666ce300faf566241/File/95127616694.pdf
    • https://kassa-evotor.ru/wp-content/plugins/super-forms/uploads/php/files/ok06gda3gr7g6rdtte9rn8qe40/97137388193.pdf
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc2a092636e---63129883900.pdf
    • https://bonpetsupply.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607af46bb489d---19114387248.pdf
    • https://evg-prague.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c15a966b6c0---3911689804.pdf
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/16072e903dfd35---92627400428.pdf
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608140d4360a1---vamibu.pdf
    • https://mindspacepsytherapy.com/upload/ckfinder_temp/files/20210530075110.pdf
    • http://classicalgardenstatues.com/uplds/file/nagijevegugenin.pdf
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c27c671697f---wepurimuvatezogebusaw.pdf
    • https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/908k3p008mtprbcua8a3gdot50/8319284153.pdf
    • http://shukokai-voves.fr/userfiles/file/47645647261.pdf
    • http://beamstraffic.ae/amb/userfiles/file/wagiparemiwigapoza.pdf
    • http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160b6483c6af3c---15351676424.pdf
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160798a0da4d86---zaveru.pdf
    • https://personalloan2u.com/wp-content/plugins/super-forms/uploads/php/files/440da9f43ecec79eba99cb4be6a87b4a/31396349421.pdf
    • https://feriaesotericadeatocha.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072ce04b1ebf---likisomuxaduji.pdf
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b03ca825e57---57800113916.pdf
    • https://genesislighting.net/wp-content/plugins/super-forms/uploads/php/files/9b0bc9fdc417f796922b4487878d7586/vetadetemikufapozi.pdf
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ffe8cc57a0---fikupifejekukap.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=read+hitchhiker%27s+guide+to+the+galaxy+online
    • 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_off00012bae.bin
29facf8c72961f8ae84dabed7d15b443657043331b579965bc487604f6b98b57		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12BAE 19896 bytes
font_01_sfnt_off00015ec1.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15EC1 16792 bytes
font_02_sfnt_off000176d8.bin
158f50b8a2ae3332c3fe1038bed49260b2fe3e10d9dd00bfcdd5df7fd3071233		 pdf-font-stream PDF embedded font (sfnt) at offset 0x176D8 11136 bytes

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