Malicious PDF — malware analysis report

Static analysis result for SHA-256 80e73c7676ad69f3…

MALICIOUS

PDF

72.7 KB Created: 2021-09-02 06:47:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: dedcf9fd78348862c60754e2e51431cd SHA-1: 49367f2d588ae1ddcb1aea1895757f68e419121e SHA-256: 80e73c7676ad69f34a308c0be6a0d74e26f1160d1fd2b1ab8a9819153c529445
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised CMS upload directories, indicating a link farm designed to distribute malicious content. ClamAV detection and ML classification confirm its malicious nature, likely serving as a lure for phishing or malware downloads. No scripts were extracted, but the embedded URLs are the primary indicators of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d69067c6be---74520611295.pdf In PDF document text
    • https://jdbailbonds.com/wp-content/plugins/super-forms/uploads/php/files/8659de9ee0854288780e491f6577e0ab/vuvizovedesojazafuwivi.pdfIn PDF document text
    • https://angkoronetour.com/userfiles/file/wobugakenuzakamavexadomu.pdfIn PDF document text
    • http://gerd-pollak.de/userfiles/file/25171381159.pdfIn PDF document text
    • http://adveotec.com/img/file/62217621045.pdfIn PDF document text
    • http://autoshiftbid.com/fckeditor/userfiles/file/68642900623.pdfIn PDF document text
    • http://haverfordhigh77.com/clients/e/e7/e7c5a96ea35a64a1345a575153f12e7e/File/57379897930.pdfIn PDF document text
    • http://bmcnx.com/userfiles/file/zumugo.pdfIn PDF document text
    • https://mercerapparelss.com/userfiles/files/debomux.pdfIn PDF document text
    • http://fontanarosaserigrafia.it/userfiles/file/bezobizozo.pdfIn PDF document text
    • https://www.properties-thassos.com/wp-content/plugins/super-forms/uploads/php/files/iafah7a5h3ptcbvnaenlsrhqsu/rinisizavaguzim.pdfIn PDF document text
    • http://scamps.biz/userfiles/file/vonelikikimotunijug.pdfIn PDF document text
    • https://dagvandearchitectuur.be/_files/file/41582829648.pdfIn PDF document text
    • http://1mosref.ru/ckfinder/userfiles/files/61782170950.pdfIn PDF document text
    • https://fullmagicweekend.com/ckfinder/userfiles/files/zugugagirarezeti.pdfIn PDF document text
    • https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160813a92a1290---10494833313.pdfIn PDF document text
    • http://klasykarozrywki.pl/public/images/fck/file/movafuzufegatukakazeravel.pdfIn PDF document text
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/160745325ba6a7---36230185908.pdfIn PDF document text
    • https://institutdesante.org/userfiles/file/bevexa.pdfIn PDF document text
    • http://trhs64.com/clients/c/cf/cfad56e582d93fa9eda51f2516e23bdb/File/2156785184.pdfIn PDF document text
    • https://tangente-mag.com/img/file/vizaselomerajolarexi.pdfIn PDF document text
    • http://www.peplex.it/wp-content/plugins/formcraft/file-upload/server/content/files/160bfeed1589d7---24018554494.pdfIn PDF document text
    • https://aquaprosmart.com/userfiles/files/pebida.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=western+road+trip+itineraryPDF 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_off0000bd05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD05 10448 bytes
SHA-256: 8bffd433892375b732c4e43b3517bf6f748ce83c7e0dc4747d82f19a4f26fefc
font_01_sfnt_off0000d4db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4DB 15576 bytes
SHA-256: 29de2fe5febb678475b555ce03e51c69db8d997a05cae19f750ff044352ca182
font_02_sfnt_off0000fc64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC64 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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