Malicious PDF — malware analysis report

Static analysis result for SHA-256 45da158f30ec3ff8…

MALICIOUS

PDF

99.1 KB Created: 2021-07-01 09:17:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 39c5557960c45a84d947fd7d1960ad19 SHA-1: 9e30e3b4faa7fe96de4c122e6254a2e8b6bfa505 SHA-256: 45da158f30ec3ff8a7568b09f398bf01506f85b68b20afc05e7b2966577eb7c3
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file is identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics reveal it functions as a link farm, with many URLs pointing to compromised WordPress sites, suggesting a phishing or malware distribution scheme. The presence of urgency lures, though low-signal on their own, supports the malicious context.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9872

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/16096c1b13d4ee---denateruw.pdf In PDF document text
    • http://teechart.com/uploads/images/files/sesuza.pdfIn PDF document text
    • https://mmszke.hu/files/file/sorepoka.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3d2d121754---54820074968.pdfIn PDF document text
    • https://readxyz.com/wp-content/plugins/super-forms/uploads/php/files/328f2d32dbb6bacd47534265a370646f/nejisawav.pdfIn PDF document text
    • https://armenia4d.com/contents//files/nojezumugasedisepujivexa.pdfIn PDF document text
    • https://sckprime.com/wp-content/plugins/super-forms/uploads/php/files/76c7ae22f2d4f133023ebed9b7035720/xawiteso.pdfIn PDF document text
    • http://livingkaneohe.com/userimages/50016585885.pdfIn PDF document text
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e8b8a24ef0---tosoxolutufobaroler.pdfIn PDF document text
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/160aab7e1bf26d---69440787616.pdfIn PDF document text
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607373b06d405---tujosabamepivudido.pdfIn PDF document text
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/ddjgpfd92mksb4a14diocfle18/gujidozesil.pdfIn PDF document text
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4cfd34ff03---73775009197.pdfIn PDF document text
    • http://ylgems.com/file_media/file_image/file/mitabogov.pdfIn PDF document text
    • https://www.apartamentselsllacs.com/wp-content/plugins/super-forms/uploads/php/files/8bpq4qlri0uqjfoqg1887fmi61/35046566569.pdfIn PDF document text
    • https://jakspravnenapsa.cz/userfiles/file/36185554109.pdfIn PDF document text
    • http://olympusflights.com/files/files/29375300508.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070025687da9.pdfIn PDF document text
    • https://glass-haus.ru/wp-content/plugins/super-forms/uploads/php/files/ccac2668b1168bc05a48944532158610/47147344947.pdfIn PDF document text
    • https://refour.eu/wp-content/plugins/super-forms/uploads/php/files/7ab4c29e1adcc58f70ef2bfc0a91669d/13121892125.pdfIn PDF document text
    • https://atl-50.com/files/file/likubedifenikakisemelav.pdfIn PDF document text
    • http://global-gypsum.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d5e5215ca83---pexupizoj.pdfIn PDF document text
    • https://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/628188c3b7c40768d2d23ccabbc7e4f1/54309999006.pdfIn PDF document text
    • http://autoscuolavalerio.it/userfiles/files/1710903327.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=different+types+of+parrot+cichlidsPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000108ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108BA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000120d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120D1 10832 bytes
SHA-256: 3c405735e53a68340da59594aa80fe569f59aac2bc05889156b0a4f9841fcae6
font_02_sfnt_off000139c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139C1 17764 bytes
SHA-256: a8a213f564b7cbfb21331263c876628ad1d7d0d0a524ac7a83336b49b2940470
font_03_sfnt_off0001686b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1686B 16380 bytes
SHA-256: 677e9695f62afeefa27de66f2ae2c7cbd721294f5310bfc85fc12255cd4c105a

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