Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2fe86d62878255d…

MALICIOUS

PDF

101.7 KB Created: 2021-07-12 17:08:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6de3a315c0827c6f853af1442adb3bff SHA-1: 04f8201ae663dead20125f550f2a2c1f559f367c SHA-256: e2fe86d62878255d356808cd27f408b72838ab5daeb4720d94cf53fa0a5bcca7
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, with numerous embedded URLs pointing to compromised CMS upload directories, likely intended to lure users to malicious content. The document body is heavily obfuscated and appears to be generated by wkhtmltopdf, suggesting it's not meant for direct user reading but rather as a container for malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9657

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 http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a38c08ef7b4---7258612152.pdf
    • https://augsburger-dartliga.de/uploads/file/58269424048.pdf
    • https://swimproject.eu/wp-content/plugins/super-forms/uploads/php/files/88b2b90c248ab0d6e18b3ffbe6f81208/powopawawi.pdf
    • http://afslab.asia/upload/files/nomuzadamanogi.pdf
    • http://beijingxinzhi.com/userfiles/file/20210629194533_1075670445.pdf
    • http://ivepe-elearning.gr/assets/UserFiles/mainHome/file/suweregukefexamo.pdf
    • https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d3cb38ea37---tesevudub.pdf
    • https://eduinfinite.com/wp-content/plugins/super-forms/uploads/php/files/25b22dadc2fc1c4a8f86bb616cb6096e/80628547619.pdf
    • https://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/045343a53bb9d5015098ee9763786252/21636170959.pdf
    • https://mimpiindah1.com/contents//files/falijefe.pdf
    • https://www.karavanlakesfet.com/wp-content/plugins/super-forms/uploads/php/files/a9b576228c6747ddb0ebf1fe51295e87/mojarisegezegozes.pdf
    • http://hotelrefah4ter.ir/basefile/hotelrefah4terir/files/39453674127.pdf
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075e1ed57664---51236897878.pdf
    • http://www.aadhar-interior.com/userfiles/file/xetixezimotupubuxopikom.pdf
    • https://thetitangroup.ca/wp-content/plugins/super-forms/uploads/php/files/56656e29a8958c7ea5606e3992f61dc0/43586619057.pdf
    • https://askopenko.com/wp-content/plugins/super-forms/uploads/php/files/41e128a59876b2cf8b4e27b2e61f452c/savadomarotodakugulag.pdf
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/16076bc8cc1b31---17646185610.pdf
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160836d0820360---5451470892.pdf
    • http://snypes.nl/img/customer//files/33300240508.pdf
    • http://ankaser.com/userfiles/file/37562954174.pdf
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/16073c792a177d---69834513864.pdf
    • http://rlponder.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/rilegazoleseguwu.pdf
    • http://phillipwhiting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609720b74f986---bimunosufinenidofomita.pdf
    • http://recamonde.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606ec827cf4f3---jemovafor.pdf
    • http://cohensevents.com/clients/74638/File/wozimovizokew.pdf
    • http://club-integra.ru/userfiles/file/41725240125.pdf
    • http://dobraukraina.org/sites/all/sites/dobraukraina.org/files/gerifofaxololijinid.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=forts+of+rajasthan+pdf
    • 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_off0001228f.bin
8887d5c4df90285791296ab7c03145180ecc0a6c77c1bbb81a37c03db87f967a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1228F 10432 bytes
font_01_sfnt_off00013a22.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13A22 16792 bytes
font_02_sfnt_off00015234.bin
c8ce3d80c14c5d76e02e7e949e56b0bfdf86bbe451accc203330625e1a03a8c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15234 18120 bytes
font_03_sfnt_off000180c9.bin
dc7658dd34036b18f2a33fa5dad293a96c6223c5175f31ace46f8f83af3accff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x180C9 1692 bytes

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