Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e6ee9c6444c3084…

MALICIOUS

PDF

98.2 KB Created: 2021-09-05 04:52:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: c7e31cfad7e20f2acec6951d270ea528 SHA-1: f2088551ba37db39618bd11d911d9d5b4284c4dc SHA-256: 1e6ee9c6444c3084647a30a0afeb434a5f206368e44eaded3ad4ed9781c31cc4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1055 Process Injection

The file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs pointing to various websites, some of which are hosted on compromised CMS uploads or disposable domains. The primary goal appears to be redirecting users to external sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9875

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://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/e481b5644f2de611b35ca8610e52bb79/rutesilugenabatibalulabuv.pdf In PDF document text
    • http://vstarmp.cn/upload/files/20210622_012803.pdfIn PDF document text
    • http://cageart.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a363322fcc1---bunenewopogigosido.pdfIn PDF document text
    • https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc8c3090fbc---82880027175.pdfIn PDF document text
    • http://townofwinslowin.com/flash/townofwinslowin.com/file/perojodamedijojezol.pdfIn PDF document text
    • http://waetsukai.jp/system/ckfinder/userfiles/files/40330992808.pdfIn PDF document text
    • https://dla-pracownika.pl/pliki_user/File/tukiveripetonowuro.pdfIn PDF document text
    • http://rivebistro.net/ckfinder/userfiles/files/84544309835.pdfIn PDF document text
    • https://petek.biz/resimler/files/xibonil.pdfIn PDF document text
    • http://www.marcelasemper.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a482e147f07---94995161761.pdfIn PDF document text
    • http://riverbendhay.com/clients/4/4e/4e1cbd84181290ddb66fb035c9950ff6/File/beritiludurawi.pdfIn PDF document text
    • http://suliaox.com/v15/Upload/file/20218232116207284.pdfIn PDF document text
    • https://ausztriasi.spawellness.hu/upload/hirlevel/files/49262032340.pdfIn PDF document text
    • http://apcmagon.com/userfiles/mozexapipivejawoxabi.pdfIn PDF document text
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607963fe42e2a---76459046885.pdfIn PDF document text
    • http://vistobrasil.net/uploads/file/23854585165.pdfIn PDF document text
    • http://www.kzhep.in.ua/wp-content/plugins/super-forms/uploads/php/files/dkmn74sl8ibidghnqdj5cdvbp1/xeker.pdfIn PDF document text
    • http://www.segurosfacility.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1611ebc5585f9b---mibekebig.pdfIn PDF document text
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609843a5136e6---92574609003.pdfIn PDF document text
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/0b1092cdba0cda1872dbd913f2d1cc69/bizukijotokewas.pdfIn PDF document text
    • https://expeditions-travel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160989aaac582b---lozadelokadus.pdfIn PDF document text
    • http://geodeslaboratori.eu/userfiles/files/24851380857.pdfIn PDF document text
    • http://moscowprice.com/content/xuploadimages/file/dujafowiguk.pdfIn PDF document text
    • http://tovicetour.com/FileData/ckfinder/files/20210828_B3BB4204005A82CA.pdfIn PDF document text
    • https://www.entornopublicitario.com/wp-content/plugins/super-forms/uploads/php/files/ff437ebbb9b31ccb38bb117e046e749e/87562363880.pdfIn PDF document text
    • https://buonoantonio.it/userfiles/file/70540619274.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=introduction+to+photogrammetry+and+remote+sensing+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_off000113cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113CC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012bde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BDE 20056 bytes
SHA-256: 4378e71407f24916f936e0aa433b298c8aa095aca9bbfc306fca78989ed0f01c
font_02_sfnt_off000160af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x160AF 11188 bytes
SHA-256: 83a017744dfe40e952752985bacd0ad3677ef1e0b00a0d81ee29682836c95cf1

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