Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2b9772124dd9730…

MALICIOUS

PDF

81.8 KB Created: 2021-08-03 23:52:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 39e14c7725685bf5bd47e48d06df23ef SHA-1: 8b8a21aaa890e43c2986f211f95067d3f76f626c SHA-256: d2b9772124dd9730268d741091dfb254ee60e4302d7b454e671f2070de94fa2f
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains numerous embedded links, many of which point to compromised CMS upload directories or disposable hosting, indicating a phishing or malware distribution attempt. The ClamAV heuristic also flags it as a 'Pdf.Phishing.Trojan'. While no scripts were explicitly extracted, the nature of the links suggests the document's primary purpose is to redirect users to malicious sites, potentially for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3530

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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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
  • 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 http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/nc7j5oqorqj8v1tcg2k5volvb7/71866469254.pdf In PDF document text
    • http://www.majoriscambio.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606f0fb185985---bazigamezekajetezoner.pdfIn PDF document text
    • http://uptownchantilly.com/uploads/files/93112049526.pdfIn PDF document text
    • http://aihyang.com/userfiles/file/fuwovakezadewimefe.pdfIn PDF document text
    • http://diamond6ranch.com/userfiles/file/giwizije.pdfIn PDF document text
    • https://zegaoyun.com/calisma2/files/uploads/jogesimifetadozilidorum.pdfIn PDF document text
    • http://sakirnoopo.ru/wp-content/plugins/super-forms/uploads/php/files/fc56fd2aaf6c29ce151bc7ae24d18f1c/desuvakodesepujax.pdfIn PDF document text
    • http://smartraoptics.com/fck_filemanager_upload/file/zekegoxulodifez.pdfIn PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/12139812018.pdfIn PDF document text
    • http://adamlegal.com/userfiles/file/20760940023.pdfIn PDF document text
    • https://rebel-guitars.com/wp-content/plugins/super-forms/uploads/php/files/852b35cc6040880c110debaee4c486d7/23231092264.pdfIn PDF document text
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607f5e6675bbf---94100895829.pdfIn PDF document text
    • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/hsjqg0i4sk7gm0a37cugdinnj5/foxasilibob.pdfIn PDF document text
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160904488684ad---susimedan.pdfIn PDF document text
    • https://honghow.com/ckfinder/userfiles/files/68613129909.pdfIn PDF document text
    • https://www.bistro-e.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a16a69c546---vasuza.pdfIn PDF document text
    • https://www.conkite.com/wp-content/plugins/super-forms/uploads/php/files/37c4562469a8ba53da87ed5bdaed4d9f/47978261883.pdfIn PDF document text
    • http://www.zulfugar.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607b6e830e28b---4306254384.pdfIn PDF document text
    • https://lostsoulsmemorialnj.org/wp-content/plugins/super-forms/uploads/php/files/4751ae85b5a6ba8d3e819a84ca3a52d6/dobalivudigadobubejenimul.pdfIn PDF document text
    • https://pankalconstructora.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e3fe7b3e6fd---70436433356.pdfIn PDF document text
    • https://giraffeng.net/infodaily/gen-ckfinder/userfiles/files/2913458849.pdfIn PDF document text
    • http://www.caslyn.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160f9e3c797f78---retomigefudofarafamudowe.pdfIn PDF document text
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/160909d13a8f15---midufidejekoba.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a77e9d2a90b---derofumazirizali.pdfIn PDF document text
    • https://viajespereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/160755c2c626b4---30058254205.pdfIn PDF document text
    • https://www.sehersirin.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089c980bbd4e---jemuwotobijib.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=why+is+my+la+crosse+weather+station+beepingPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f942.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF942 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011159.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11159 11156 bytes
SHA-256: 44355f0b534479dbbb846c7c6b9d5716bcfe158b2584cdce338f2812ae80db4f

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