Malicious PDF — malware analysis report

Static analysis result for SHA-256 93a322a4e167662b…

MALICIOUS

PDF

104.3 KB Created: 2021-08-26 08:18:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: c7871155e8f1b0758a8c23e6fba209c5 SHA-1: fa89a389e69ab4195cbd39d093dc210fd7d1a1d8 SHA-256: 93a322a4e167662bc754e84d7b874b0891b29c6179fbcfa76903c0addcc6a017
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous external links, many of which point to compromised websites or disposable hosting, suggesting a phishing or malware distribution campaign. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://ketchas.ru/uplcv?utm_term=agricultural+project+planning+and+analysis+pdf PDF link annotation
    • https://eamenfaraz.com/cache/fck_files/file/kefiroxa.pdfIn PDF document text
    • http://dvarenda.ru/upload/file/65576188105.pdfIn PDF document text
    • http://staractivecollection.com/resimler/site/files/58435672841.pdfIn PDF document text
    • https://www.travelticket.com.au/wp-content/plugins/super-forms/uploads/php/files/a3qdo8l94l0djnpg3unrmg6016/wosaragipabimusezez.pdfIn PDF document text
    • http://beateromer.com/bilder/file/lubixugaxusofidab.pdfIn PDF document text
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609aafe3811d9---16031959275.pdfIn PDF document text
    • http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c5a9cb37264---30599237711.pdfIn PDF document text
    • http://gabinetortodontyczny.eu/userfiles/file/peginebonegumob.pdfIn PDF document text
    • http://lycee-elm.org/userfiles/file/wefukavudigexogizijinamuf.pdfIn PDF document text
    • http://uk-finansist.ru/userfiles/file/78700955106.pdfIn PDF document text
    • http://cokhilegia.com/upload/files/zepibafarutarotive.pdfIn PDF document text
    • http://rszm88.com/upfolder/e/files/20210713042313.pdfIn PDF document text
    • http://tpdw.pl/userfiles/file/wufumotejuwifewoboxox.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/6838f702ff0fbdd8faf3606b374afcf3/47824443948.pdfIn PDF document text
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4f1543482a---13813425048.pdfIn PDF document text
    • https://spbmworld.com/anaeter_capital/siteadmin/userfiles/files/suwufipelebanoraganomoz.pdfIn PDF document text
    • http://timnhanhonline.com/upload/files/11561731889.pdfIn PDF document text
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e54e4e85432---77132383268.pdfIn PDF document text
    • http://dealershop.es/userfiles/file/ruzulijixinafemuvuto.pdfIn PDF document text
    • http://animationcoach.com/userfiles/file/553412515.pdfIn PDF document text
    • http://www.putnamtaxi.net/wp-content/plugins/formcraft/file-upload/server/content/files/16087e7328d668---60339975636.pdfIn PDF document text
    • http://3lbordercollies.com/clients/a/a5/a537dd6ebb785c9f51a9b4acbfea693c/File/zesarev.pdfIn PDF document text
    • http://recruiters-zone.com/wp-content/plugins/formcraft/file-upload/server/content/files/160edfc2e47fbf---91079680982.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_off0001320d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1320D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00014a24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A24 11120 bytes
SHA-256: 5855639a17bb53205fb3e77657b2b543a9bc7055f4608d6cd885daf279b602d6
font_02_sfnt_off00016405.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16405 17620 bytes
SHA-256: 9ea3f519bb7dca8fef46a4cf698490c1a3e9058ea3e59cc4c7961022d391ce00

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