Malicious PDF — malware analysis report

Static analysis result for SHA-256 dea32921247f1963…

MALICIOUS

PDF

83.5 KB Created: 2021-09-06 17:47:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 8699b57225e4d96b42ad17f23f31922f SHA-1: e992a6b4e815dc95ed9ece16eb252763437db581 SHA-256: dea32921247f1963509f414f8bb4f6c9fde855a5c69befbb1a9d22f1343d95c1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains a link farm pointing to compromised WordPress sites, suggesting a phishing or scam attempt. Although no scripts were explicitly extracted, the PDF structure and embedded URLs indicate malicious intent, likely to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://sweetestspaparty.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c33e9a6ff70---28315531433.pdf In PDF document text
    • https://baodinhsolar.com/wp-content/plugins/super-forms/uploads/php/files/0orhi885pbkl3v1fk8rqbf2ojk/33135305768.pdfIn PDF document text
    • https://elitteaccesorios.com/wp-content/plugins/super-forms/uploads/php/files/8eebm1rdmh702t2b7k6klsd7s9/70743860489.pdfIn PDF document text
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160ecfb1bec615---kovalinitul.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/hv2fdphg0bv86jdqat0mpqasi7/97335733662.pdfIn PDF document text
    • http://nuyewpilot.academy/wp-content/plugins/super-forms/uploads/php/files/8ebbc387b0449afc037d11c3e88432ff/bolasefaxuzaboze.pdfIn PDF document text
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/3e733b4e8a82649e473e92f64d8a4e38/bixoninimire.pdfIn PDF document text
    • https://mbzgogo.xyz/web/img/podborky/files/33584682318.pdfIn PDF document text
    • https://rachelrom.com/rescontent/file/kojufu.pdfIn PDF document text
    • http://www.fotografoeventimilano.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3bd0f80795---68558294226.pdfIn PDF document text
    • http://ovstav.cz/app/webroot/files/files/90898835714.pdfIn PDF document text
    • http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/16072a10d7f3f4---jububowu.pdfIn PDF document text
    • https://dimensioninteractive.com/WYSIWYGImage/file/sobolafemusakivusede.pdfIn PDF document text
    • http://paolacaone.eu/userfiles/files/romejefiwedegogetaxomelol.pdfIn PDF document text
    • https://pmms-online.com/assets/file/limaravekifowikatadased.pdfIn PDF document text
    • http://bajcsidavidfoto.com/_user/file/goxip.pdfIn PDF document text
    • http://zulassungsdienst4you.de/bilder/file/77377138087.pdfIn PDF document text
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1608075247bac5---21805559106.pdfIn PDF document text
    • http://ichieh.tw/uploads/files/202108251535053722.pdfIn PDF document text
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dfcb2410a6---57899891446.pdfIn PDF document text
    • https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c94da4c164---donedemovalenozepapuso.pdfIn PDF document text
    • https://cleanenergy.mn/uploads/files/kijajilalepiwodas.pdfIn PDF document text
    • https://vasutaszeneiskola.hu/ckfinder/userfiles/files/ronavam.pdfIn PDF document text
    • https://1sis.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a374dde4220---41990090003.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=grosseron+catalogue+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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD41 19040 bytes
SHA-256: 03702826d75cc5d499eb1afb8ca28910fbd156b7d231642c61714db7d98eaff3
font_01_sfnt_off00010f0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F0B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012722.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12722 10840 bytes
SHA-256: 4b3c7d68392a7742c209477add3aebc4a4af32fbbda443818f940a8c0031525d

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