Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a58a839fe55346b…

MALICIOUS

PDF

89.0 KB Created: 2021-09-07 04:03:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 52a0aad58eff8fdba14601af88563a8a SHA-1: ae1e2d9ebdda88ef5425eb4757be5979a4be915c SHA-256: 8a58a839fe55346b48928fd73a329872436d4273e380ccf43e598ea0e968b8ff
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document exhibits characteristics of a phishing lure, specifically a payment redirection scam. It contains numerous links to external websites, many of which appear to be compromised or disposable hosting, suggesting an attempt to host malicious content or redirect users to phishing pages. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to trick users into revealing sensitive financial information or downloading further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://pistant.ru/uplcv?utm_term=fire+alarm+using+thermistor+project+report+pdf PDF link annotation
    • https://cbolean.com/wp-content/plugins/super-forms/uploads/php/files/pbkl0eda2onr4gj5v4p7sh6sq1/vudobofurewiroviwan.pdfIn PDF document text
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b05091eb10b---88267786135.pdfIn PDF document text
    • http://www.gesas.it/media/mailinglist/file/96879576822.pdfIn PDF document text
    • http://trustycctv.com/ckfinder/userfiles/files/65861176521.pdfIn PDF document text
    • http://www.urbanwaterways.info/files/51182468021.pdfIn PDF document text
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607e5a8c766cc---tilutozipo.pdfIn PDF document text
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608146f39bcec---subugisafaguroturuxa.pdfIn PDF document text
    • http://americansemitruckparts.com/d/files/20496738425.pdfIn PDF document text
    • http://nitm.ac.in/nitmeghalaya/ckfinder/userfiles/files/56409647808.pdfIn PDF document text
    • http://churchtextile.com/userfiles/file/sikilonudidivepobexadix.pdfIn PDF document text
    • http://ngpsusa.com/wp-content/plugins/super-forms/uploads/php/files/v97ndgbpimq5n65gl3sjgcc6o3/someja.pdfIn PDF document text
    • http://joyearland.com/ckfinder/userfiles/files/wemagugosuwizoxafurop.pdfIn PDF document text
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160752c3902536---74628158590.pdfIn PDF document text
    • http://wawa757.com/uploads/files/77967831607.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/1608e29efc2ec3---tedaderobopulajudobuk.pdfIn PDF document text
    • http://alternativefitness.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160bcccff28ce2---47314591334.pdfIn PDF document text
    • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/16083b602baa8c---tafosokoropisure.pdfIn PDF document text
    • http://cokhibaosang.com/media/ftp/file/7974068275.pdfIn PDF document text
    • http://www.johnknox.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160c7ab669aab7---ravomopojikefubaka.pdfIn PDF document text
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b61fdd93b6---zubasugoxupaf.pdfIn PDF document text
    • https://www.elshandmadedesign.nl/ckfinder/userfiles/files/74343861055.pdfIn PDF document text
    • https://www.ediliziaindustriale.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c53e2b10124---54820224023.pdfIn PDF document text
    • http://comlark.ru/userfiles/files/58720866274.pdfIn PDF document text
    • http://www.atrium-tuiles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf7ad0009a6---japofekuk.pdfIn PDF document text
    • 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_off0000eec7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEC7 20876 bytes
SHA-256: 89c52a9d1935ad9db5151a9724eaa8ed854cd36dece26fce67f2adb4919b4055
font_01_sfnt_off000123b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123B4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013bcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BCB 11272 bytes
SHA-256: 98176784987448156109d29a01a28bdf5421930d91d5d6327006fea0e1838bc7

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