Malicious PDF — malware analysis report

Static analysis result for SHA-256 db12ed9f14ff6d4e…

MALICIOUS

PDF

88.0 KB Created: 2021-09-01 19:53:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: ee05a722f6ef571b1a1977dc2f24ad69 SHA-1: d24835649e7d8e0e6bd2d724291388e56bac48f1 SHA-256: db12ed9f14ff6d4eccb0c85169ad6b28de6062bf3cc6835e7094cc6a4e58b068
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically identified as a phishing trojan. It functions as a link farm, containing numerous URLs that point to various websites, including those hosted on compromised CMS platforms. This suggests an attempt to lure users to malicious sites for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://www.ltgpartners.com/wp-content/plugins/super-forms/uploads/php/files/f50dfe26d15b1acdcef87b4b147a25f8/66190949280.pdf In PDF document text
    • https://reparationmobile.net/userfiles/file/namog.pdfIn PDF document text
    • https://nabsangram.com/userfiles/file/43423118419.pdfIn PDF document text
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16098be939a0a5---peputoxosud.pdfIn PDF document text
    • https://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/ooj7ip1pkm8c5gu36q7u9ed7f4/riwevamamule.pdfIn PDF document text
    • https://dailyhondaotomientay.com/upload/files/29361921483.pdfIn PDF document text
    • https://www.plsok.com/wp-content/plugins/super-forms/uploads/php/files/39ab57a20c4a736aa8e0db6e663c1f65/bofapapedifurupi.pdfIn PDF document text
    • http://herningbadintra.dk/app/webroot/upload/files/xixupiridavizefasoxesi.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609842a87db58---tisexor.pdfIn PDF document text
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16093f55658f6e---welajiximax.pdfIn PDF document text
    • http://ladue62.com/clients/2/2d/2d0487a90c18d3a1b3df44839405a665/File/luwewefubifajupumix.pdfIn PDF document text
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/708feef29804567f0d647c58baf7e345/fisireviwaj.pdfIn PDF document text
    • https://spectrumohio.com/wp-content/plugins/super-forms/uploads/php/files/1639856feac47146e140521cfb02d698/lazaxazupifalerosakoli.pdfIn PDF document text
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c73c54490b---sefexizudedaj.pdfIn PDF document text
    • http://mwflower.com/upimagesfile///kedasuwudikofukusaw.pdfIn PDF document text
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/16087a995cfa25---96352942956.pdfIn PDF document text
    • https://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/4csq8g18m5kve4vbpkc32tng2a/kapigugizogebanifepagu.pdfIn PDF document text
    • https://autotrilogy.com/wp-content/plugins/super-forms/uploads/php/files/113ba45d5c06d77dd94c524027fbe4af/46613604243.pdfIn PDF document text
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5fcf33a8ff---vupasunev.pdfIn PDF document text
    • http://nage-z.com/ckfinder/userfiles/files/34343596209.pdfIn PDF document text
    • http://twfindia.in/userfiles/files/zokeso.pdfIn PDF document text
    • http://findmecakes.com/userfiles/files/82155789274.pdfIn PDF document text
    • http://maydangson.com/vietkiendo/upload/file/98571510603.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=how+to+copy+text+from+a+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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d92e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD92E 10664 bytes
SHA-256: 45698fe15672d5962f772b104080de853f4ca95e914b4a83020fab67560682e3
font_01_sfnt_off0000f1b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1B2 17456 bytes
SHA-256: b120958a9d5165f4eb40cc19532f36c5b916c86be9a77bd7a8da1d7439dbfc7f
font_02_sfnt_off00011e2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E2B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off0001363c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1363C 17652 bytes
SHA-256: d9f464498d0f1164f3a37d6d486bfb0593e3f87e738e55fdf09a1381057ab872

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