Malicious PDF — malware analysis report

Static analysis result for SHA-256 04ce0ae28f8f50ac…

MALICIOUS

PDF

84.8 KB Created: 2021-06-28 03:57:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2d0c1479cf6fd5994f9fab9d26717fbc SHA-1: 3d52b297af2e48a7d21f32f2df9d1f31d699fd26 SHA-256: 04ce0ae28f8f50ac2a11df1516cba4db7a0b3fbe57612e8751eb95f9549bc005
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple compromised WordPress upload directories and other disposable hosting sites, as indicated by the PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics. The ML classifier and ClamAV also flagged this PDF as malicious, specifically as a phishing trojan. While no scripts were explicitly extracted, the nature of the link farm suggests an intent to redirect users to malicious content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://vannordenvastgoed.nl/userfiles/file/mufajijobaxememajifewi.pdf
    • http://elmiraclassiccountry.com/wp-content/plugins/super-forms/uploads/php/files/bb2ie96th4kj3todb0b8faobv4/rinuxi.pdf
    • http://iccarrentals.com/files/file/notidumira.pdf
    • https://autoteam.in/ckfinder/userfiles/files/libeweriku.pdf
    • http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/ede63bf31abf22a3f21488012bcfd8e6/79296351319.pdf
    • https://kassa-evotor.ru/wp-content/plugins/super-forms/uploads/php/files/migi2je8gq5h9mubpbb2q10f7o/bupodesegemo.pdf
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074799bd4aa8---bufoxuvegiponod.pdf
    • https://polnische-zaune.de/userfiles/file/89762812813.pdf
    • https://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/1bq4sbklvnerv3n31ajfkli7bl/pifadosugivow.pdf
    • http://abwcoliseum.com/uploads/files/56300412826.pdf
    • https://evg-prague.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607caf2ed87c9---ripexinofoboxu.pdf
    • https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/rbhvire69mkad5qgtlqc8dgct1/xobimuk.pdf
    • https://bestcoloringpages.com/userfiles/file/lizikukaliposisevuwivuxe.pdf
    • http://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c015b04592---jizorugojawowixenub.pdf
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f891804744---21331930812.pdf
    • http://accronline.com/userfiles/file/xadilenuvugozuja.pdf
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/7ebc8d60dc91564a6a2db95a6314f744/zejisosokigud.pdf
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072fce752d29---92253278797.pdf
    • https://sketchup360.vn/wp-content/plugins/super-forms/uploads/php/files/562fa5sjjff2r6muomq8tshlcj/sovujixufemumejexegul.pdf
    • https://artasedanasingaraja.com/uploadfck/file/paridogimomidowikulomi.pdf
    • https://mimpiindah1.com/contents//files/tikalivomesaladefef.pdf
    • http://boathousebrokerage.com/userfiles/file/lawan.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=the+production+possibilities+frontier
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea33.bin
526d1b08cbb1303f8d5591c42ecde5bc76d78398b59dc5592910db0e124bab65
pdf-font-stream PDF embedded font (sfnt) at offset 0xEA33 16684 bytes
font_01_sfnt_off000115a9.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x115A9 16792 bytes
font_02_sfnt_off00012dc0.bin
17afaba29e166f6f55dcdcb253a04c071552527fd4c3abfeff70fd00643fe3d0
pdf-font-stream PDF embedded font (sfnt) at offset 0x12DC0 10760 bytes