Malicious PDF — malware analysis report

Static analysis result for SHA-256 272a0677c912eddc…

MALICIOUS

PDF

92.4 KB Created: 2021-08-04 19:05:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 44826e59e33d6960bcf725555ec570b3 SHA-1: 21be148762237ae63a2a600710befe936016e2e2 SHA-256: 272a0677c912eddcc311271c7afd0b0357b19508efe7ecfd657fd021aa64d401
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable domains, suggesting a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the structure and URL patterns are consistent with a malicious PDF designed to lure users to external malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://pixomot.ru/uplcv?utm_term=biblia+de+estudio+holman+rvr+1960+pdf PDF link annotation
    • http://erbilsunhotel.com/wp-content/plugins/super-forms/uploads/php/files/lsaqoiema14mn513nkp1b80mu2/fegemarosovot.pdfIn PDF document text
    • http://svx.su/ffile/file/62152002285.pdfIn PDF document text
    • http://gmei.lt/ckfinder/userfiles/files/49489558879.pdfIn PDF document text
    • https://digireg.it/upload/39762540313.pdfIn PDF document text
    • http://bandenplaats.nl/cmsimages/file/jumeriku.pdfIn PDF document text
    • http://doo-san.com/userfiles/file/20210513211340.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/16104116bf22aa---mowafulokikiligolozez.pdfIn PDF document text
    • https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2cdc283e0c---jireverefuvatajad.pdfIn PDF document text
    • http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a59d41e1308---libutodavekekorunekomogad.pdfIn PDF document text
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/16075baad6036d---95663328419.pdfIn PDF document text
    • https://a2designbg.com/userfiles/file/sebalutapafasuzoxeb.pdfIn PDF document text
    • http://tasarimak.com/ckfinder/userfiles/files/neluvesapebetab.pdfIn PDF document text
    • https://ladangmimpi.com/contents//files/sivesosakozotakivozidaz.pdfIn PDF document text
    • https://yastudio.net/wp-content/plugins/super-forms/uploads/php/files/2690c3c5a5beb90370dd31863c5f9632/80225695569.pdfIn PDF document text
    • http://nashcentralfalcon.com/clients/d/d5/d5bea9c86035def548a020f7371d19fe/File/41896066381.pdfIn PDF document text
    • https://mrmusicfoundation.org/wp-content/plugins/super-forms/uploads/php/files/92nta87m3am9rs7q95vm7f2g0r/talapuninitaro.pdfIn PDF document text
    • http://eviljoy.com/UserFiles/File/42021630635.pdfIn PDF document text
    • http://mobiliteit.nu/files/mijir.pdfIn PDF document text
    • https://sunarchegypt.com/userfiles/file/jerodasu.pdfIn PDF document text
    • http://gayaarchi.com/userfiles/file/20210613193816.pdfIn PDF document text
    • https://razvozka24.ru/wp-content/plugins/super-forms/uploads/php/files/659577b9ac411d7cfb48584614f57cb4/49729579899.pdfIn PDF document text
    • http://gerocuki.hu/user/file/zubagefosajelez.pdfIn PDF document text
    • http://lovewhereyoulv.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/38288e305ba8f8b13f5a7273ca1264d3/65821112749.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_off0000f8b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8B5 11632 bytes
SHA-256: 2d797b360e31cab118a0d722a6f70a9470593d879c5eae138c941427d04da075
font_01_sfnt_off000113ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113EF 21200 bytes
SHA-256: 54662eb4ab70d79c7dc15bf1eae908d9c0e66cd583ee4a2f330af673be3bd026
font_02_sfnt_off00014939.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14939 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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