Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5cc7e4a9fa74552…

MALICIOUS

PDF

80.3 KB Created: 2021-06-21 17:06:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: f03f04b3b8aeb7e93ddf43c19ec12c1f SHA-1: 910d79d171fec4e1303f1a0a77c346b71e53b4fe SHA-256: d5cc7e4a9fa745528f5106f997919b386dd3d1c9f7c728448d8858d4994488ff
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous embedded URLs, many pointing to compromised CMS upload directories or disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The presence of these links and the overall detection pattern indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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://smidgel.ru/uplcv?utm_term=my+boy+pokemon+fire+red PDF link annotation
    • http://dailyxedayhang.com/userfiles/files/28200772355.pdfIn PDF document text
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/16078763f769fc---94367019936.pdfIn PDF document text
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/iq3t7of4lnesl24lrukbnm3nb6/maxin.pdfIn PDF document text
    • http://clarklawtexas.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/34043066504.pdfIn PDF document text
    • https://nhaban24h.com.vn/wp-content/plugins/super-forms/uploads/php/files/4t4upueuhpq80n8kj5ts3lm6li/38783894928.pdfIn PDF document text
    • http://micronforgacsolo.hu/UserFiles/file/lonotelixowosodiviga.pdfIn PDF document text
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160994eb6bf4b5---rifejadebumezobaxavodo.pdfIn PDF document text
    • http://www.rkcomdesignservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084e2f91f841---41306772808.pdfIn PDF document text
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609b1ca0193d9---junosozaravunobe.pdfIn PDF document text
    • http://qhs1978.com/clients/d/dd/dd8db5a278a7ad55a2ada34b8e38ebcc/File/95279160283.pdfIn PDF document text
    • https://techson-cctv.com/upload/file/25192825271.pdfIn PDF document text
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/1607f44011cf4e---vomezarisuzakisisewubidax.pdfIn PDF document text
    • http://phdpecs.hu/userfiles/files/roranaxesu.pdfIn PDF document text
    • http://szzxwx.com/Upload/Upload/file/20216171132387393.pdfIn PDF document text
    • https://www.picmephotoboothhire.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608f90accfcda---57236290127.pdfIn PDF document text
    • http://travelshops.pl/userfiles/file/tinumakadexafitirup.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c75ef17839---61172646281.pdfIn PDF document text
    • 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e890.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE890 5672 bytes
SHA-256: 8a2eee7a604d637a16c53866328cec36979bd3d501a4af497bcec94f06e2d2e5
font_01_sfnt_off0000fc39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC39 5080 bytes
SHA-256: 381198c4f75b19742a6711453725ee0d9072e95d05599e35db9620431d359968
font_02_sfnt_off00010d80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D80 11104 bytes
SHA-256: 572261056ce456608bad9e1cbef92a11fa799bb6a167c60b8c654d1b3a8218b3