Malicious PDF — malware analysis report

Static analysis result for SHA-256 08ed775c51e30741…

MALICIOUS

PDF

80.3 KB Created: 2021-09-17 20:57:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 2b688f9c4f60fdc2dfa24fb2091dfae8 SHA-1: 46dde76da86dcc3d0ddcef604c434a8c454ddc60 SHA-256: 08ed775c51e307410a982324926019961adfc0d1e2e25f352dedf71b76a53411
172 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing and trojan distribution. It contains embedded JavaScript and a link farm pointing to compromised WordPress uploads and disposable hosting, likely intended to redirect users to malicious content or downloads. The presence of a 'download button' heuristic further supports the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

Heuristics 8

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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 http://smartdeal.pl/files/upload/files/87035456867.pdf In PDF document text
    • http://ferrogep99.hu/static/media/file/771546328.pdfIn PDF document text
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/55c2e32488c2d998f8418c54d1f02056/renazenugepomat.pdfIn PDF document text
    • https://tungafilm.com/dorceiys/ckfinder/userfiles/files/gonelag.pdfIn PDF document text
    • http://gldbirdgel.com/user_img/files/32745757502.pdfIn PDF document text
    • http://gildiamasterov.ru/userfiles/file/soxupukutapisezujiwidasa.pdfIn PDF document text
    • http://thegioidahoacuong.com/uploads/image/files/27574159770.pdfIn PDF document text
    • http://rallyteamwalraven.nl/file/gofimejorozizumudivivo.pdfIn PDF document text
    • http://m2m2design.com/userfiles/66482790327.pdfIn PDF document text
    • http://ledspectrumthai.com/ckfinder/userfiles/files/pusuzogajenugaxofofugura.pdfIn PDF document text
    • http://zs-g.jp/app/webroot/js/ckfinder/userfiles/files/bodaketajafapijifozes.pdfIn PDF document text
    • https://mhreng.com/userfiles/file/30583956214.pdfIn PDF document text
    • https://vico-real-estate.com/ckfinder/userfiles/files/kepevusaferav.pdfIn PDF document text
    • http://max-metal.pl/gfx/file/jovurote.pdfIn PDF document text
    • http://keramann.ru/uploads/files/bekafadatakenovuxow.pdfIn PDF document text
    • https://ceccarbotosani.ro/userfiles/file/73383327410.pdfIn PDF document text
    • http://dzirerealtors.com/uploads/69709508355.pdfIn PDF document text
    • http://vkp.ru/upload/global/file/2122906021.pdfIn PDF document text
    • https://www.potterycommercials.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1612f05a2e1399---lifisedakareg.pdfIn PDF document text
    • https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/16da4c1483e5363756576a65ad7bb23f/23524962626.pdfIn PDF document text
    • https://ercrs.org/wp-content/plugins/super-forms/uploads/php/files/e3tireaqodpputg2l7nm2q5bbj/pizajajesoxur.pdfIn PDF document text
    • https://mytutr.com/wp-content/plugins/super-forms/uploads/php/files/9ceeba152236393d917c9fe32cf26ffd/voxedugekokugekin.pdfIn PDF document text
    • https://simbotour.ro/ckfinder/userfiles/files/3814368300.pdfIn PDF document text
    • https://edu-mate.kr/_UploadFile/Images/file/67107948583.pdfIn PDF document text
    • http://chukgoobok.com/files/fckeditor/file/56326279648.pdfIn PDF document text
    • http://thailaundry.com/imgUpload/files/nipadukamu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=pitch+perfect+1+full+movie+free+downloadPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d288.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD288 18140 bytes
SHA-256: 0ab3841e7271ba7561a35ef68d936a119679bcdea9c0f2a2549fad6fd2bcbcd7
font_01_sfnt_off000101c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101C1 11020 bytes
SHA-256: 33b55d86ae28022f2bdeacbbb897d0cf9b0a1bbc9565a8e4de369d3ac45f1d92
font_02_sfnt_off00011b4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B4B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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