Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1dd68993f9d57e6…

MALICIOUS

PDF

91.9 KB Created: 2021-06-26 07:27:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e08701ee8f04d5f85d54306443201591 SHA-1: e8de1b2fce96796b13dc1b25f3dadb6117b4e7e2 SHA-256: b1dd68993f9d57e6133b306942e24a83842dc4195370eda6e738ee351104ed2f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple compromised or disposable hosting sites, which is a common tactic for phishing or malware distribution. While no scripts were explicitly extracted, the nature of the link farm suggests it is designed to lead users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9786

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://sellerflows.com/wp-content/plugins/super-forms/uploads/php/files/e2a94f72a5b05fc23e832ed70e734407/27015487154.pdf
    • https://atcotourismtravel.com/userfiles/file/vasabunusawapida.pdf
    • https://apparel.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/20c53b125c0c3d3dac37bc9055e3022d/gakisidosaxilamare.pdf
    • https://awlights.com/wp-content/plugins/super-forms/uploads/php/files/f6bfedf7c2c19f0d737e985e00e7cbd8/sagaxitun.pdf
    • http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160c9a57e11f43---wifufowole.pdf
    • http://limoride.net/gallery/file/93491817497.pdf
    • https://fastcomputer.vn/wp-content/plugins/super-forms/uploads/php/files/76b05f4f1eebf336b7d823121c195dc5/xelexesavomupur.pdf
    • http://projectbudapest.hu/wp-content/plugins/formcraft/file-upload/server/content/files/160aa3445e6c91---92362669225.pdf
    • http://ceskylakros.cz/userfiles/file/6239775493.pdf
    • http://www.companyforte.com/imagenes/editor/file/vogomelamowu.pdf
    • http://liebherr-tr.com/userfiles/file/31161350953.pdf
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a48a1c5bacc---nadakabuwinira.pdf
    • https://www.frontierexim.com/wp-content/plugins/super-forms/uploads/php/files/3l7n8kvhb75dseab10g500moel/vilale.pdf
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/16098421880158---zofifenuxezozub.pdf
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080f2dd6f71e---99003204788.pdf
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/1608bb2fd13917---sodajelirenixapusaxew.pdf
    • http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/160cde1c875532---25234560949.pdf
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/c9be56cf912cc71135bba81a2626d5fb/17436206230.pdf
    • http://fitviewer.biz/files/file/govejalalexoz.pdf
    • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/160813decb14ca---kowoxijax.pdf
    • https://agrilaui.com/userfiles/file/83422099063.pdf
    • https://thriveelearning.com/wp-content/plugins/super-forms/uploads/php/files/77ce9f0591515c684c007f204922c6e9/39759982008.pdf
    • http://jinohair.com/upload/files/nikotalopolewuzuluvawinef.pdf
    • http://hondaototanan.com/upload/files/95750297428.pdf
    • http://domholidays.com/userfiles/file/ladexudepuwida.pdf
    • https://raiporjai.com/piceditor/file/41264349365.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=butterfly+oil+pastel+painting
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee2f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE2F 16792 bytes
font_01_sfnt_off00010646.bin
4be2bdb7274ff86c74ce9df4e0cfb6a9e2017b1a9b64b2eba58692459361c032		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10646 10800 bytes
font_02_sfnt_off00011f58.bin
3b5bf52827107f50626c091cc69b8f9e31be1363c88eb09f55853c6d7606f18c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11F58 16592 bytes
font_03_sfnt_off00013695.bin
e94e929dcd8d0c8ffa6c598093280fc52e80e15c6289bf296c7cd9bb7c3450df		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13695 16592 bytes

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