Malicious PDF — malware analysis report

Static analysis result for SHA-256 daef566c9f9308ea…

MALICIOUS

PDF

102.3 KB Created: 2021-07-27 19:58:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 6d3ed8cca9210f5c6eac6345bb7e22ba SHA-1: 7799f88b08dcb76c63d17195e2dcd4b448e83e67 SHA-256: daef566c9f9308ea051c5f241513c7a510850927b9751337b03c115ff2ac0045
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. Heuristics reveal it functions as a link farm, directing users to multiple external URLs, some hosted on compromised CMS upload storage. The presence of numerous unknown URLs suggests a phishing or malware distribution campaign.

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 http://studiocommercialedelpiano.it/userfiles/files/risivifevomaxa.pdf In PDF document text
    • http://absolutelyneon.com/userfiles/file/tebijobogopuresiluba.pdfIn PDF document text
    • http://chekeeh.ir/basefile/chekeehir/files/6361410607.pdfIn PDF document text
    • https://auto826.com/uploads/files/bolinudofome.pdfIn PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ee3267bb52---sutamotazibexiwezipuzus.pdfIn PDF document text
    • http://applexin.com/ttpsea/files/file/fumanebumatexuko.pdfIn PDF document text
    • http://belhavenhighschoolalumni.com/clients/13962/File/tazafamevodetizesojebi.pdfIn PDF document text
    • http://nextgenship.net/upload/file/20210626162467917337.pdfIn PDF document text
    • http://granitemountainranch.net/userimages/20498490901.pdfIn PDF document text
    • http://air-ned.com/uploads/files/97435384523.pdfIn PDF document text
    • http://bobhendrix-law.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/jorizugapazerodusamone.pdfIn PDF document text
    • http://barrybusiness-crm.com/ressource/devis-photo/files/kibusoke.pdfIn PDF document text
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16089c524b5672---jizimo.pdfIn PDF document text
    • http://101-games.ru/images/uploads/files/6838932018.pdfIn PDF document text
    • http://safaraval.com/basefile/safaravalcom/files/78510120959.pdfIn PDF document text
    • http://neuragen.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16084e59f5fe55---86142241193.pdfIn PDF document text
    • http://nawooelcs.com/upload/userfiles/2021/06/files/210605060542.pdfIn PDF document text
    • http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160969ca127042---tirevigawepixinumos.pdfIn PDF document text
    • https://ontime-taxi.kg/wp-content/plugins/super-forms/uploads/php/files/a17f851c9f63be6e8c671e3f1a1ab86e/damivavirowimi.pdfIn PDF document text
    • https://autosaloncenter.com/uploads/file/45274907729.pdfIn PDF document text
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608246ae108bb---40628358635.pdfIn PDF document text
    • http://say-international.eu/userfiles/file/denawenitura.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=the+enjoyment+of+music+free+pdfPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012b8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B8B 10984 bytes
SHA-256: bbd5c97470e94fa86b1d64c7bebf52c5abc23f403202dc13da00e7e4e313c1a2
font_01_sfnt_off000144db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x144DB 17500 bytes
SHA-256: ae7dfaf40ca3603fa49c6e94fdf15487574f2c542598f3caabe0250580ef6194
font_02_sfnt_off000172c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x172C5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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