Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ece6e7c6dfdc647…

MALICIOUS

PDF

95.7 KB Created: 2021-07-24 15:14:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 36f05e5751b5d6fe51fc49589bf73175 SHA-1: 6d6da415f1fc6bf66a28fe8c1112cbe64ba73aa5 SHA-256: 2ece6e7c6dfdc64799c826bce26fcf8bc05129f6abfc6daffe6ff827bad3ef93
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. Heuristics indicate it functions as a link farm, containing numerous URLs pointing to potentially compromised websites. The document body is heavily obfuscated and unreadable, suggesting it's designed to conceal its malicious intent rather than convey information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9923

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://www.qlsny.com/wp-content/plugins/super-forms/uploads/php/files/f8f96b1096d0610aae48ef125e188bab/zoralebudupolow.pdf In PDF document text
    • https://endoaccessories.com/wp-content/plugins/super-forms/uploads/php/files/qsa2jtek1dq3r6jlkdc0442v0j/jodosalaf.pdfIn PDF document text
    • http://belloverde.net/emailer/file/66710552540.pdfIn PDF document text
    • https://rpdev.org/ckfinder/userfiles/files/43584085865.pdfIn PDF document text
    • http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1608618b006372---liwanukibinapozepi.pdfIn PDF document text
    • http://puzynowska-kancelaria.com/userfiles/file/19755211260.pdfIn PDF document text
    • http://alexlunacoach.com/img/editor/file/durum.pdfIn PDF document text
    • https://masterpieces-mallorca.com/wp-content/plugins/super-forms/uploads/php/files/b0880a06979da8b25179b32a4c6d9bbb/wenorej.pdfIn PDF document text
    • https://floraplant.gr/FCKeditor/userimages/file/jujuwi.pdfIn PDF document text
    • https://cardion.dk/gfx/fckimages/file/nanogesisuwetixexo.pdfIn PDF document text
    • http://whs1979.net/clients/65916/File/kisukesimunemos.pdfIn PDF document text
    • https://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/gakl17u1b6m01hog5echsfiudk/35181276913.pdfIn PDF document text
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/160def60101445---98843474602.pdfIn PDF document text
    • https://pcparts.fr/ckfinder/userfiles/files/rajebujajagubug.pdfIn PDF document text
    • http://braintradingbcn.com/wp-content/plugins/super-forms/uploads/php/files/0f06337685d9dc01cdf4908cadcde06b/79331329464.pdfIn PDF document text
    • http://hillcountryawningsandsunscreens.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608122e031baf---54853759019.pdfIn PDF document text
    • https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160a0c6cc45e38---gotuwapebumuzowodofoxizun.pdfIn PDF document text
    • https://www.taxiserviceh24.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca78ed7519---22491358591.pdfIn PDF document text
    • http://elazentrale.de/images/uploaded/file/bigobegenuvafepi.pdfIn PDF document text
    • http://marcth.pl/media/fck/file/kizepixatezinufami.pdfIn PDF document text
    • http://josephlillianmorrisfamily.com/clients/59960/File/35850060389.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/160e937cb41e53---57951608373.pdfIn PDF document text
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160950f67471fa---60517602689.pdfIn PDF document text
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/136c32e745eeabfd6ed0985e2f7ecdb8/wifupujanifirupufafij.pdfIn PDF document text
    • https://artbynela.com/uploads/file/kilawodabanumoxetexape.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=les+exercices+de+fran%C3%A7ais+de+5%C3%A8me+ann%C3%A9e+primaire+pdf+marocPDF link annotation
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f281.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF281 17288 bytes
SHA-256: 2910b583f6abc558a83268b832afc9d67b833102fae5662d1fdec8b22b3f2e3b
font_01_sfnt_off00010c03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C03 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001241a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1241A 11340 bytes
SHA-256: 4f9ac2d37a289e8f50a65d2a1dd7f35e57c58bf35b44fd23a5b787e67886b167
font_03_sfnt_off00013dcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DCF 18764 bytes
SHA-256: 5425aec8469e3d5eaddb638759b114b154392c022c0af8b5ec0e32ef9ea02edf

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