Malicious PDF — malware analysis report

Static analysis result for SHA-256 e14e09549c413a17…

MALICIOUS

PDF

68.2 KB Created: 2021-09-25 20:12:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: 8aa346cf4d3803a7ff5cbfbabcbc0831 SHA-1: 88ff42c6de0c0d8280be22bd9cb50b7112b1324d SHA-256: e14e09549c413a176c8dd74ccd6a6a5e810cc2fe8744e738ef3ccac82e5e0712
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF exhibits characteristics of a phishing lure, including being image-heavy with minimal text and containing numerous external links, some hosted on compromised CMS platforms. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the presence of multiple links suggests the document is designed to redirect users to malicious sites for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 68 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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.tahitotfaluovodak.hu/ckfinder/userfiles/files/86673363088.pdf In PDF document text
    • https://nikoljski.com/ckfinder/userfiles/files/60164192323.pdfIn PDF document text
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/161417d35620f1---34369868204.pdfIn PDF document text
    • https://md-bud.pl/szklo/photos/file/26742881341.pdfIn PDF document text
    • http://jinyudachem.com/upload/files/kezowozifosutegoderakif.pdfIn PDF document text
    • https://ncsccalgary.com/userfiles/files/78062283471.pdfIn PDF document text
    • http://goldartline.ua/userfiles/file/suporivori.pdfIn PDF document text
    • http://kco.su/userfiles/file/67651039994.pdfIn PDF document text
    • http://emannsltd.com/userfiles/78819473795.pdfIn PDF document text
    • https://www.dekleinewerf.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613508822c63f---zusozesezakevak.pdfIn PDF document text
    • https://hsdinstruments.nl/uploads/files/tufewojugataduw.pdfIn PDF document text
    • https://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614dc6a7bc001---janefunetebenizuk.pdfIn PDF document text
    • https://bibliotheque.ville.deux-montagnes.qc.ca/ckfinder/userfiles/files/fanefurupuzogudo.pdfIn PDF document text
    • https://metnar.pl/web/uploads/files/99759529533.pdfIn PDF document text
    • http://zhizhencn.com/filespath/files/20210919005117.pdfIn PDF document text
    • http://eegbiofeedback-leszno.pl/userfiles/file/96207811185.pdfIn PDF document text
    • http://styrexon.cz/userfiles/file/91587879200.pdfIn PDF document text
    • https://mlspoland.co/files/file/wewanupoto.pdfIn PDF document text
    • http://wittlich-luexem.de/userfiles/file/gorebuza.pdfIn PDF document text
    • http://zit-tech.com/userfiles/files/kebogusazutub.pdfIn PDF document text
    • https://perfecthospitals.com/FCKeditor/file/26129246359.pdfIn PDF document text
    • http://daonshop.com/files/fckeditor/file/mizelajor.pdfIn PDF document text
    • http://mhinflatable.com/upload/file/27093604343.pdfIn PDF document text
    • http://hublihorse.com/uploads/userfiles/files/zevutojobutenofuri.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=lemonade+war+online+pdf+freePDF 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_off0000b0c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0C7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c8d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8D9 14016 bytes
SHA-256: e039a6bff93f7a30d3720999765351c3a24216c17711d3934d67e201bedda89f
font_02_sfnt_off0000ebb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBB4 10436 bytes
SHA-256: eb9598ca4eb27cdd29a3a1aa64beaa0b0ae9ca65a1999b93ccd6b0261034bd41

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