Malicious PDF — malware analysis report

Static analysis result for SHA-256 eac6a7bbdb6d0de3…

MALICIOUS

PDF

86.2 KB Created: 2021-09-07 22:54:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 18189d052a54bb6f4b2ff1d691ba7752 SHA-1: f21b0d4e6c0025948e9fd3467038070fb5f079b8 SHA-256: eac6a7bbdb6d0de318013133825e492d27a527af17a8d06ff1d8709253ee66e1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, with numerous URLs pointing to compromised CMS uploads and disposable hosting, likely to redirect users to phishing sites or download further malware. No scripts were extracted, but the structure suggests a lure document intended for initial access.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9930

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://jackinthegymtpe.com/uploads/files/202109060449312262.pdf In PDF document text
    • http://zigzagontwerp.nl/sites/default/files/file/xotapapalevofowotenivit.pdfIn PDF document text
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f5a7aeebaa---vobalisukuvuri.pdfIn PDF document text
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e575d1938da---30131968497.pdfIn PDF document text
    • http://mabo-meccanica.eu/userfiles/files/69640006045.pdfIn PDF document text
    • http://rayanchem.com/d/files/7265005923.pdfIn PDF document text
    • http://szyuangang.com/UserFiles/file///juroxuf.pdfIn PDF document text
    • https://optimustelecoms.com/ckfinder/userfiles/files/49054311448.pdfIn PDF document text
    • https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/6romsejpb6eiaueiu7vis47rk0/70302661437.pdfIn PDF document text
    • http://aeronautike.com/userfiles/file/42548307197.pdfIn PDF document text
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/06a37e4fa63a79a507e231fd69e4b3ff/xoxon.pdfIn PDF document text
    • http://goldnumber.info/userfiles/file/99170755648.pdfIn PDF document text
    • https://pearproperties.in/userfiles/file/44475130520.pdfIn PDF document text
    • https://mgogs.com/mgfiles/file/vagamivasilizinifukonemo.pdfIn PDF document text
    • https://www.truckersplantparts.co.uk/ckfinder/userfiles/files/71403244237.pdfIn PDF document text
    • https://www.axelendinggroup.com/wp-content/plugins/super-forms/uploads/php/files/9fa646c366a46431dbec07c824f44020/molujabenuwoze.pdfIn PDF document text
    • http://www.tlo.ntou.edu.tw/ckfinder/userfiles/files/penopefilefepefigef.pdfIn PDF document text
    • http://eko-inwest.eu/upload/file/95237153300.pdfIn PDF document text
    • http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607dbf356994f---likusudosupisogujozu.pdfIn PDF document text
    • http://ajtoablakcentrum.com/_user/file/lodikafo.pdfIn PDF document text
    • http://mai-avto.ru/upload_files/file/35620105002.pdfIn PDF document text
    • https://catherinehourihan.art/wp-content/plugins/super-forms/uploads/php/files/613f693712f864758bd7696b007a9f36/butuxozu.pdfIn PDF document text
    • https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/cbff428764be3e80f08929b46ec5fdbf/lutemikifirexu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=gautam+buddha+story+in+bengali+pdfPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c916.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC916 11336 bytes
SHA-256: 1d67e739c28fbf9d5b6d9ddb45e48be0c988adecbdd8fcd8e993f52fd9af80e4
font_01_sfnt_off0000e334.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE334 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fb46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB46 21412 bytes
SHA-256: e06151b73f1b3691df9df95e8508766377f5cea02d502a9d4eccea04a127fd7e
font_03_sfnt_off00013373.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13373 16164 bytes
SHA-256: a29b536ab701e0f3a4d03943dd56dd4ec8b8c0d8b29b8e28b2448b9bd76a7e77

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