Malicious PDF — malware analysis report

Static analysis result for SHA-256 14227f75bc3b867a…

MALICIOUS

PDF

83.5 KB Created: 2021-09-19 17:09:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 1f837410bd127c1818cfebac81573081 SHA-1: 9b2f79f2ca95e452c4aaf5a002c3e30e9cf7d47a SHA-256: 14227f75bc3b867af742c7c35c465939a8cb83d5f1b0f8c1f41a5bee0f79080f
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The presence of numerous embedded URLs and a 'link farm' heuristic indicates a phishing or redirection attempt. The ML classifier also strongly suggested maliciousness, supporting the conclusion that this document is part of a malicious workflow designed to lead users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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
  • 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 http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/161422b5f0affb---28729923042.pdf In PDF document text
    • http://prunay-en-yvelines.fr/ckfinder/userfiles/files/dukunofomiwo.pdfIn PDF document text
    • http://gowowdeli.com/uploads/files/rodajugabogoxozugafi.pdfIn PDF document text
    • http://pjteam.hu/uploads/26256114899.pdfIn PDF document text
    • https://vjlabor.pitscovn.com/uploads/Upload/files/82548632301.pdfIn PDF document text
    • https://sentralperdana.com/file/98516345171.pdfIn PDF document text
    • http://modelseafarm.com/kweb/ckfinder/userfiles/files/gavutopowunokif.pdfIn PDF document text
    • https://v-rshine.com/upload/images/files/tugifiwa.pdfIn PDF document text
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130a42589ca0---jirisapi.pdfIn PDF document text
    • http://ambulatorioveterinarioilprato.eu/userfiles/files/25071888486.pdfIn PDF document text
    • http://pobierzplik.pl/uploads/files/24830124587.pdfIn PDF document text
    • http://wuchem.com/upload/files/92667574884.pdfIn PDF document text
    • http://cnzhongkui.com/fckeditor/editor/filemanager/connectors/php/uploads/file/151055031194.pdfIn PDF document text
    • https://calendarsunrooms.com/userfiles/files/wazot.pdfIn PDF document text
    • http://cableesmaltado.com/d/files/linadidekizobakidiroxoka.pdfIn PDF document text
    • https://fundacjanadzieja.com/images/wyswig_images/file/zufisalume.pdfIn PDF document text
    • http://awards.nl/img/cms/file/vusulusopufatim.pdfIn PDF document text
    • http://haokunchem.cn/upload/files/vekon.pdfIn PDF document text
    • http://didula.com/img/file/dezikebagimumuxatiz.pdfIn PDF document text
    • http://castrolmintabolt.hu/images/upload/file/kenekodaberavetafe.pdfIn PDF document text
    • http://labuchedeberce.fr/userfiles/file/66118148473.pdfIn PDF document text
    • http://www.cavice.fi/tiedostot/files/misesutupezogowenowuba.pdfIn PDF document text
    • http://asv-solnice.cz/_files/file/zaluvirudaxitofuzasuf.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=tool+skin+ff+apk+downloadPDF 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_off0000e3f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3F1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fc08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC08 10304 bytes
SHA-256: f3c18e33bbe167d1f7393a447860796ca3071791dffe6828e3bc3b406c2fb0ef
font_02_sfnt_off0001135b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1135B 17300 bytes
SHA-256: 48ba58ccf6e4ee39259a2bd5e6b88a57cb9bf7db2b844a5e6b0fa4d9b88b073c