Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ed3624004200c65…

MALICIOUS

PDF

73.6 KB Created: 2021-09-02 00:13:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: f0660b8446e7735457524cc3e8c5cc4c SHA-1: 08f4a274aab1811e2cf2fc1e034b14ad714b974a SHA-256: 7ed3624004200c6548b7601bd2349b8803c9667c273cc00f67f540cd9f656269
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by ML classifiers and ClamAV as malicious. It functions as a link farm, containing numerous URLs pointing to websites, many of which appear to be on compromised CMS platforms. The primary purpose seems to be directing users to potentially malicious content or phishing sites, leveraging a spearphishing attachment vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://baigeleather.com/userfiles/file/xesejo.pdf In PDF document text
    • https://vetranhtuongmamnon.vn/wp-content/plugins/super-forms/uploads/php/files/mlihcc0tgpjo1eetmke2l2cd6v/2120242532.pdfIn PDF document text
    • http://denda.co.kr/ckfinder/userfiles/files/sovorenumazovefigemuvedik.pdfIn PDF document text
    • https://autoschiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606f4f093d51b---83855476385.pdfIn PDF document text
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c0f6a32b3e---pujajen.pdfIn PDF document text
    • http://border-inn.com/CKEdit/upload/files/81490971856.pdfIn PDF document text
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/161092a81de361---jofapuxeluma.pdfIn PDF document text
    • https://o-dance.com/upload/files/buxazedabulakumizotod.pdfIn PDF document text
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bbd3869a64---30328659635.pdfIn PDF document text
    • https://area34.info/wp-content/plugins/super-forms/uploads/php/files/k61mqqkc369bnqst31mmmjld32/kavedamoko.pdfIn PDF document text
    • http://vocal.bpv.su/content/files/files/nupolizajukagutu.pdfIn PDF document text
    • http://live-lessons.net/lcj/web/uploads/assets/file/44605365777.pdfIn PDF document text
    • http://refinerlink.com/userfiles/file/jeduzesazexivaxafexege.pdfIn PDF document text
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/27412f5261958bc196eb9a49cdc3f423/vopoz.pdfIn PDF document text
    • http://expertsystemgroup.com/file_media/file_image/file/23632929691.pdfIn PDF document text
    • http://nuyewrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/ceba4b9c334aba6a1a02e4e9c4c0088e/gilab.pdfIn PDF document text
    • https://aneri12.cz/res/file/zuzitimepavuguweg.pdfIn PDF document text
    • https://aslimitada.com/userfiles/file/16667567835.pdfIn PDF document text
    • http://atiksigorta.com/files/7743591868.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/e1c76b2b6aff7ce897119ea432d02c0d/lalusuxapowawirum.pdfIn PDF document text
    • http://ebiocell.com/uploadfile/file///2021080316195442.pdfIn PDF document text
    • https://sgdivorcelawyers.com/wp-content/plugins/super-forms/uploads/php/files/eb73f53f54821d0d9872744310ef86db/dubabovesobe.pdfIn PDF document text
    • http://mamnonlittlesun.com/upload/files/94180014748.pdfIn PDF document text
    • https://www.higher-energy-trampolineclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072fb764d600---xobarukovanesemixizow.pdfIn PDF document text
    • http://tsnpharma.com/upload/files/nivotiv.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=sir+patrick+spens+in+prose+formPDF 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_off0000bfc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFC9 16008 bytes
SHA-256: 09411d50d7401657c711aa69e887fb1e0dc1d47bd4b4e446e6a8152b067ed302
font_01_sfnt_off0000e851.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE851 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010068.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10068 10764 bytes
SHA-256: d07e97dab6e43bfd63a8bb7a2c2fa59f53b0e3fedff42a2cf283e401d1748846

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