Malicious PDF — malware analysis report

Static analysis result for SHA-256 47c65f098ee7fc99…

MALICIOUS

PDF

84.5 KB Created: 2021-09-01 19:34:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: b171d95363918d3e9830ab20bb5660f7 SHA-1: fbb11703cdb638f9d017a90baf2fa2ee3a403301 SHA-256: 47c65f098ee7fc99f632e5625ff00a34aa8f76fe4f5ad2a045bc1511cc602bce
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is identified as malicious by ClamAV and an ML classifier, with heuristics indicating it's a link farm pointing to compromised CMS uploads and a password archive lure. The embedded URLs, though some are marked benign, suggest a phishing or malware distribution attempt. The document's structure and the presence of multiple links to potentially compromised sites indicate a multi-stage attack designed to deliver a payload disguised as a password-protected archive.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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 http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/1612ac251e556f---34667310894.pdf In PDF document text
    • http://qtjdb.com/UploadFile/2021/06/08/file/20210608_024710_117.pdfIn PDF document text
    • http://jubileejec.com/userfiles/files/pivasozadi.pdfIn PDF document text
    • http://pavcargo.ru/wp-content/plugins/super-forms/uploads/php/files/7166f4fc4fb7e6bbc2bd8f873512f53c/letamikewurakofivusego.pdfIn PDF document text
    • http://xn--e1aazeoc7d.xn--p1ai/images/shared/file/xipekijaxepebomuw.pdfIn PDF document text
    • http://cinebuzz.be/uploads/userfiles/files/zowevijumugifevaxonobobe.pdfIn PDF document text
    • http://xn--80aaae7amexjfdlfdfg.xn--p1ai/files/file/padesasodinizipezuvubopiw.pdfIn PDF document text
    • https://zilalcooling.com/other_files/File/18491482737.pdfIn PDF document text
    • http://svenstavik.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097e3e71d4fa---41070925036.pdfIn PDF document text
    • https://homini.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160c1fc82d9560---58972558337.pdfIn PDF document text
    • https://www.elitelawnsolutions.co.uk/wp-content/plugins/super-forms/uploads/php/files/alerlvncnpcndeb68thj9o1rlp/getud.pdfIn PDF document text
    • http://radio6deenero.com/uploaded/files/35007427167.pdfIn PDF document text
    • https://www.aironface.com/wp-content/plugins/super-forms/uploads/php/files/2bdde0f2b498d966bea7f4cb75092d2f/firudovijo.pdfIn PDF document text
    • http://www.tamtrebinhminh.com/public/files/befamaxujolixokigebedi.pdfIn PDF document text
    • https://tumujerrusa.com/userfiles/jozowipu.pdfIn PDF document text
    • https://pearproperties.in/userfiles/file/44475130520.pdfIn PDF document text
    • http://sistarelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/mogona.pdfIn PDF document text
    • http://cermak-expo.cz/data/files/file/kemusofasatin.pdfIn PDF document text
    • http://dmhu.eu/uploads/uplib/file/kidebazifugewesibavagosul.pdfIn PDF document text
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093c1989df19---62429077576.pdfIn PDF document text
    • https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/368bc233f77eda5f32781ee892bed757/joguwaf.pdfIn PDF document text
    • https://donnasalon.ru/wp-content/plugins/super-forms/uploads/php/files/29abde10fa214f500f1ac5ea9baf4be5/begirazarifaramon.pdfIn PDF document text
    • https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608170bb29b7b---giwovemoj.pdfIn PDF document text
    • https://impariant-club.ru/wp-content/plugins/super-forms/uploads/php/files/9cf877b3eca41d568d28e4fd4d07a975/9406917677.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=how+to+open+password+protected+pdf+on+macPDF 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_off0000e59c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE59C 10720 bytes
SHA-256: 503578e0ed05c865be5c582606f57d949f3cffae8d3020df889c85f0fac6c0d6
font_01_sfnt_off0000fe45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE45 17272 bytes
SHA-256: e17990b9cbd1dd51cdd5e348ab04c0193d022840b4794847f0b8c847c3d8b9e1
font_02_sfnt_off00012b6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B6F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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