Malicious PDF — malware analysis report

Static analysis result for SHA-256 34cde842e2472587…

MALICIOUS

PDF

85.0 KB Created: 2021-07-09 07:42:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 04959a099956b6b07b714eab32bd0f70 SHA-1: e2e3db485df2c8cb0bf6a70ed2eb6debc9880616 SHA-256: 34cde842e24725876949dbdaeafd58eac2d76290829bd14b5dd54b1128a19db2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains a large number of external links, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery. No scripts were extracted, but the structure and URL patterns are indicative of a common phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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 https://catamma.ru/uplcv?utm_term=fifth+district+court+of+appeals PDF link annotation
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077e9561db53---tejiguxobi.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/163ba8fd09cf2d69d7c0ef23b29664ed/56187818991.pdfIn PDF document text
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9ae5ab2682---falosotefapasaremej.pdfIn PDF document text
    • https://mygo.com/ckfinder/userfiles/files/30188462284.pdfIn PDF document text
    • https://mujeresenmovimientoplus.com/userfiles/file/33002525364.pdfIn PDF document text
    • https://zazilha.com.mx/wp-content/plugins/super-forms/uploads/php/files/30f5a4a1e83d75d935d5f56a9aa0d623/guzolawikiwijon.pdfIn PDF document text
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/160933a3293d03---guropiv.pdfIn PDF document text
    • http://wernitznigg.at/files/67437949663.pdfIn PDF document text
    • https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c41bf9a583c---babelapiloruw.pdfIn PDF document text
    • https://greenturtleproductions.com.au/wp-content/plugins/super-forms/uploads/php/files/4428b7d281418c54fe99ad93f9371fdc/9778445756.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/0t65kjvj2v26kv4v1tm3m31876/tosotaxefenorirolozofuzan.pdfIn PDF document text
    • http://sjhrz.com/images/upload/File/fevakinoxodabekomogif.pdfIn PDF document text
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/7g6jt7et6cs4qp7nkrg01v2ug2/23931913292.pdfIn PDF document text
    • http://bociany.sk/media/file/40644686913.pdfIn PDF document text
    • http://pahsclassof2005.com/clients/d/d6/d61c4c031b0f3af13d3e88110ef3a3e1/File/selolikevogomonalefegedo.pdfIn PDF document text
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/70e9b814f5767ad23f4b8c7df243d10c/50809771974.pdfIn PDF document text
    • http://vssteel1999.com/ckeditor/userfiles/files/belisipafiwokuniruv.pdfIn PDF document text
    • https://gites-les-bardots.com/userfiles/file/74379362990.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/7petf0qrfqjtpujpvop1eqk457/dezupetusogom.pdfIn PDF document text
    • http://31kouqiang.com/userfiles/file/1623325555.pdfIn PDF document text
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b420592d314---sirimobitupe.pdfIn PDF document text
    • https://hcs1000.org/wp-content/plugins/super-forms/uploads/php/files/bc79b74da92572890614acde35117a1b/fujelobewuzarexipu.pdfIn PDF document text
    • https://ifacemount.com/wp-content/plugins/super-forms/uploads/php/files/52usvdp7an6t7fc4j3fkvc1m1f/85453516368.pdfIn PDF document text
    • https://leunamgroup.com/wp-content/plugins/super-forms/uploads/php/files/adf56a2951a0f732132512825dd27bad/23467772935.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e62e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE62E 18460 bytes
SHA-256: 5d74be0ea87938d455c0aa92271bf3f71edc37e73bca582585191c508929a4dd
font_01_sfnt_off00011643.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11643 10688 bytes
SHA-256: 8576586e15833ed1b4271ace1bfd63302bb6cc7e44b1a9b9d6350176c3771a4d
font_02_sfnt_off00012ee6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EE6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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