Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e2805ebad21044b…

MALICIOUS

PDF

110.9 KB Created: 2021-07-14 01:02:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 24e54708cf6d131e54632d3417efde1b SHA-1: 94fd6fcb57c081b9101ccf06a8256b44686d84ae SHA-256: 9e2805ebad21044bec56b729518c4050c8985973f0cdc42643e49da82b272572
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple compromised WordPress sites, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the nature of the link farm and the PDF structure suggest it's designed to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9330

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 http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c979f979684---matakelapinuzebusikajati.pdf In PDF document text
    • https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b5db42cadb---79503312707.pdfIn PDF document text
    • http://dataction.org/demo/dataction/media/22564591285.pdfIn PDF document text
    • https://securitydm.rs/slicice/file/jetibowufatusawufoto.pdfIn PDF document text
    • https://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/eopeq7cpnbpfm2bllv0g2honkb/46777087629.pdfIn PDF document text
    • http://owtsreunion.com/clients/e/e7/e717deb27d844c69ffc49b2d3c0bb1a5/File/79292974949.pdfIn PDF document text
    • http://voxel-avocats.fr/uploads/file/17867644500.pdfIn PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/b4cd77b6a5852e76efbd476a5522884a/92088344430.pdfIn PDF document text
    • http://africa-emergence2019.com/userfiles/file/mirawofetelalinafep.pdfIn PDF document text
    • http://imcborivali.org/userfiles/file/75857380915.pdfIn PDF document text
    • https://riverasphotovideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d44cc14e7d---51728346309.pdfIn PDF document text
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609aa72b6f4b1---jajes.pdfIn PDF document text
    • https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/b8eaaf6991448ab9b1b15cb8f0c2dfc4/tekifeziwajeve.pdfIn PDF document text
    • http://stringquartet.biz/web/images/fck/file/gezexewunuwudu.pdfIn PDF document text
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e4a94f0e54---zarokofowoxozavapiwagaxu.pdfIn PDF document text
    • http://elonsummerstorage.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a61aae813a5---45059108310.pdfIn PDF document text
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ce02fb4dfbc---gulupemarewalitarowi.pdfIn PDF document text
    • http://kfnmsz.com/upfolder/e/files/20210624152322.pdfIn PDF document text
    • http://dossalas.com/wp-content/plugins/super-forms/uploads/php/files/13d51d45579f3b50144257aa4548f286/rejitemegezanapagaxasepa.pdfIn PDF document text
    • https://orangcar.com/app/webroot/upload/files/mokaraminatoka.pdfIn PDF document text
    • https://noddy.nu/images/file/71774366014.pdfIn PDF document text
    • https://www.kasekimi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608345ec326e9---mapitoweropijabew.pdfIn PDF document text
    • https://n95america.com/wp-content/plugins/super-forms/uploads/php/files/463daf1f290a805ea9b85024a3ad6723/75405502918.pdfIn PDF document text
    • https://www.surajinformatics.com/wp-content/plugins/super-forms/uploads/php/files/160a1548d213b035e3defbe3666cffee/nirojotodonipomapus.pdfIn PDF document text
    • https://christembassyromford.org/wp-content/plugins/super-forms/uploads/php/files/4579d95788e0fc708b993819b437597d/54786168103.pdfIn PDF document text
    • http://broadviewlibrary.org/uploaded_bvlib/file/budegisoluraw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=avengers+age+of+ultron+yifyPDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00016c11.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x16C11 18100 bytes
SHA-256: 95775c47a08c16957ec937131147d708d88be104f00a165e124706cf8164e87d
font_00_sfnt_off00010935.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10935 29732 bytes
SHA-256: 650a6b50164b2a1d3b16122638039877e886e7c9dd700067556993409bdccc89
font_01_sfnt_off00015400.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15400 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00018887.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18887 10648 bytes
SHA-256: a7c0df153ce6da6d5094fa4950ef3f186fda9df429caac1f8ef8531396a09f70
font_04_sfnt_off0001a118.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A118 2388 bytes
SHA-256: 5afcb533146352e0bf0b4c604bee3cbc14e5f7b36e0472a2bbc374a75ba5349e

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