Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a0978805d2c3ec6…

MALICIOUS

PDF

74.5 KB Created: 2021-09-12 09:08:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: ec96c171c271993eaa9ae06a069c1d73 SHA-1: 840388940c4b8dc4d67213f8fb11b7e6ab2021f1 SHA-256: 6a0978805d2c3ec61ad76e712b381104616935ef7c690826f075e0d47fafe7e2
156 Risk Score

Malware Insights

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

The PDF file contains a link farm designed to redirect users to various websites, some of which are hosted on compromised CMS platforms. The primary lure appears to be 'gta 5 online download free mobile', suggesting a phishing or scam attempt to trick users into visiting potentially malicious download sites. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://giritrademark.com/content_files/files/90579484315.pdf In PDF document text
    • https://boucherienabli.com/uploads/FCK_files/file/55507317467.pdfIn PDF document text
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/16130d1c1b6fa5---fopisebotepofix.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16139378920114---47585937458.pdfIn PDF document text
    • http://pune-india.info/userfiles/file/libotedafapujav.pdfIn PDF document text
    • http://dentalweek.eu/userfiles/files/zazoselila.pdfIn PDF document text
    • https://obermeyer-modemarkt.de/upload/file/tabozotenetegorasonelazem.pdfIn PDF document text
    • http://www.fullertherapy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ce261aed4f---zewetewebifu.pdfIn PDF document text
    • https://mehreganimaging.ir/images/upload/files/vudosese.pdfIn PDF document text
    • http://ipllaser.in/uploads/16882753981.pdfIn PDF document text
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c15ac6200d---13930397124.pdfIn PDF document text
    • https://smwebtechnology.com/arishayurveda.com/userfiles/file/88289611840.pdfIn PDF document text
    • https://venusnvs.com/userfiles/file/22542803061.pdfIn PDF document text
    • http://taaltoetsvo.nl/userfiles/file/88963354127.pdfIn PDF document text
    • http://www.tiande-global.com/ckfinder/userfiles/files/nabatokavijikekafikipugop.pdfIn PDF document text
    • http://asu.com.vn/wp-content/plugins/super-forms/uploads/php/files/elia09bcr10un5tk0l6i8aj8bf/jerazapojoxabonoxujim.pdfIn PDF document text
    • http://zhizhencn.com/filespath/files/20210904074900.pdfIn PDF document text
    • http://fsnmmaterials.com/UPFILE/userfiles/files/12147908814.pdfIn PDF document text
    • http://chiari-web.com/ckfinder/optimist/files/75223223685.pdfIn PDF document text
    • http://www.pattyn360.com/upload/forum/files/keroregij.pdfIn PDF document text
    • https://yarpaket.ru/userfiles/file/90493982253.pdfIn PDF document text
    • http://darstin.com/userfiles/files/xututiwar.pdfIn PDF document text
    • http://slesnick.net/userfiles/files/goziwadubilojozimu.pdfIn PDF document text
    • http://spbi.cz/res/file/jeleruzatok.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=gta+5+online+download+free+mobilePDF 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_off0000c23b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC23B 16180 bytes
SHA-256: 5eda14102b95a992c6927a6dfcf0f41f0a3a572ee5b1306295cb2fc0f5d199b6
font_01_sfnt_off0000ebb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBB3 10744 bytes
SHA-256: 3278a499816f3ab6452be0f30e9c866fe986b0432fcb3ab313eb3170826a875e
font_02_sfnt_off00010480.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10480 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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