Malicious PDF — malware analysis report

Static analysis result for SHA-256 07671dab2c5ed01e…

MALICIOUS

PDF

78.5 KB Created: 2021-08-22 04:53:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: b727e3cf35212116de48237e31f56f07 SHA-1: 62c69d0434d2a2f5981daebc99de1aadd97cc36e SHA-256: 07671dab2c5ed01e5d92173b27ab5e1cabac9c04ad03415a7706d2e1b2f1e020
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable domains, indicating a link farm designed to lure users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • 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.
  • 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://inwebjor.ru/uplcv?utm_term=ejercicios+de+probabilidad+con+diagrama+de+arbol+resueltos PDF link annotation
    • http://gapoom.com/upload/fckeditor/file/7999699010.pdfIn PDF document text
    • http://lnianemarzenie.pl/userfiles/file/89902773112.pdfIn PDF document text
    • https://jollytime.ru/wp-content/plugins/super-forms/uploads/php/files/ecdcb6d776f14e2e676e115fefcf0323/85878903738.pdfIn PDF document text
    • http://dribblebar.pl/userfiles/file/juwapusitamojagogem.pdfIn PDF document text
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/160839032a4cba---31253450877.pdfIn PDF document text
    • https://rockdental.co.uk/wp-content/plugins/super-forms/uploads/php/files/875f636fa9da976ec70a7b7419bc13b1/3234902337.pdfIn PDF document text
    • http://heizler.hu/files/file/gibonuwixadevutiwami.pdfIn PDF document text
    • http://botanicgardenscafe.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160bb3461c4e67---68619595077.pdfIn PDF document text
    • https://gearforfree.com/wp-content/plugins/super-forms/uploads/php/files/qr6q2jc63oc59tl6gipidabg74/xanixuguxumizojanavi.pdfIn PDF document text
    • http://lammensfilip.be/uploads/files/60031600386.pdfIn PDF document text
    • http://obrienbuilders.com/userfiles/file/42302292218.pdfIn PDF document text
    • https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/82042dbdb20683705a8bb0edf2e0dede/rugoxebafupodajovirojosux.pdfIn PDF document text
    • https://bandotrading.com/uploads/file/tukepisuxaluvetirexe.pdfIn PDF document text
    • http://www.communityheroesproject.org/wp-content/plugins/formcraft/file-upload/server/content/files/16077ff770af36---71433443791.pdfIn PDF document text
    • https://fobiy.net/wp-content/plugins/super-forms/uploads/php/files/9b618ba894913b7ed31b7a336d393038/35012029767.pdfIn PDF document text
    • https://monographie.com/ckfinder/userfiles/files/xidifexubozovow.pdfIn PDF document text
    • https://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/5a6e8cpnqpc4u5qe69s2p2d6f4/denufukimexel.pdfIn PDF document text
    • http://inglewoodreunion.com/clients/68690/File/tegazoledukigirivafiwene.pdfIn PDF document text
    • http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/l7issjri11m263ti0rjbonqsmb/48388512402.pdfIn PDF document text
    • http://jinruily.com/UploadFile/file/20210726235604901.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/c5e12d4d8c453d442d6ee2f85c46bdc5/nolamepabakipafijozivu.pdfIn PDF document text
    • https://yidinfo.net/wp-content/plugins/super-forms/uploads/php/files/mof6oqqcel5hn1kk5fmhp6ag7n/wulujulugezosub.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_off0000cc7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC7C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e48e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE48E 16964 bytes
SHA-256: ed6803d39d7eed493048e9e5ad38e3f4da0eb02ffc590aaad2c703f6940a6de4
font_02_sfnt_off00010f45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F45 11212 bytes
SHA-256: 8eb705c8935307829d3966873c2ffe81636bd0e62cd8cbffec4ba6b72b895305

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