Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e651785ef650f45…

MALICIOUS

PDF

95.7 KB Created: 2021-06-29 06:47:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1836e15e31b6aa38a0460f8899c4007f SHA-1: 4f7f2637171eae583b56f5cfaa52cd69b0ae92e1 SHA-256: 1e651785ef650f45a236067b1a1c7cdb37800a51d597e0a7e4c53ae01453619d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. The document contains numerous links, many pointing to compromised WordPress sites, suggesting it functions as a link farm or phishing lure. The presence of external URIs and the use of compromised CMS upload storage indicate an attempt to redirect users to potentially malicious content or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9918

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://coretry.ru/uplcv?utm_term=honey+for+9+month+old+baby
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e305332b73---fipasizuzemepadawezu.pdf
    • http://globaltruthmediagroup.com/clients/a/aa/aa8380eac451876ae6ab993bf3a720d6/File/82860160751.pdf
    • http://whatdwellswithin.com/file/46960063783.pdf
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160d9f8691d0d3---dotunemoki.pdf
    • https://nikosdimos.gr/userfiles/file/tikokeruxawufugepowite.pdf
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160b073c2217d9---voxewapenuleweke.pdf
    • http://midiabyz.com/wp-content/plugins/super-forms/uploads/php/files/001eebcab2563784fe0deb1b9b4f06df/4195551280.pdf
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160c20a14c22ed---somudusasunabobiradagede.pdf
    • https://floorco.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/493cb5efd0415d5f9901ffe7e6ea334e/zigupezileranufefil.pdf
    • http://workprohealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073202fdd912---tanomeraz.pdf
    • https://evg-prague.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16072e3e6081ac---51146219526.pdf
    • http://asokmontridental.com/userfiles/file/43229636470.pdf
    • http://chinoboxingclub.com/clients/36032/File/mivarisumuteju.pdf
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/b86edcc18595d7549f15719e221f3b7e/sajipexugizowamanenipizif.pdf
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae7bc254da5---64389963879.pdf
    • http://www.urbanwaterways.info/files/witozurowogufe.pdf
    • https://www.asahinadigital.com/wp-content/plugins/super-forms/uploads/php/files/3kr3smnbgh6bitb352n3e33oin/4326538137.pdf
    • https://him-home.ru/wp-content/plugins/super-forms/uploads/php/files/8352a4ecf4d5fe052297eaec7174acbb/jixelixusikobatibuzi.pdf
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/unhh6v7ac4vdtvddt54b2qtsr2/87045741771.pdf
    • http://sghscsjamarai.org/guruhargobind/userfiles/file/xasogur.pdf
    • https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d1a0d87bb6---bigod.pdf
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/dtdpf7r1dubv7shicenuah8jj4/nepejusifipuxolijaro.pdf
    • http://campbellelectronics.com/uploads/ligidoduzejogeke.pdf
    • https://gea99.com/ckfinder/userfiles/files/50079126679.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00010f15.bin
c429ac5ba501cd5a0608ff2a0020dda07c6fc8027ca8101266d785a69e26bc65		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x10F15 18372 bytes
font_00_sfnt_off0000f704.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF704 16792 bytes
font_02_sfnt_off00012c1e.bin
b0025fcfb1115e4a4ae464812726eaa44dac47d1f8478822442d0b79a5e959c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12C1E 16544 bytes
font_03_sfnt_off000156c7.bin
4577e8ca9e3d5f78fd96bdcec765bfb4d29c5977b326a2abecc62fd984971c75		 pdf-font-stream PDF embedded font (sfnt) at offset 0x156C7 10772 bytes

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