Malicious PDF — malware analysis report

Static analysis result for SHA-256 e95eced74da48f78…

MALICIOUS

PDF

132.5 KB Created: 2021-08-16 16:26:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: f899d2e991412ed8509040682832e56b SHA-1: b4ecbf5e5c7990d1d08cdd8a0e3539b44ff30252 SHA-256: e95eced74da48f784d2413aad23b06b296cd9e132a70c0d3d50a01b50f9730fb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites hosting other PDF files. Heuristics indicate this is a link farm designed to obscure the final destination, and ClamAV detected it as a phishing trojan. The ML classifier also strongly flagged it as malicious. The presence of embedded URLs and the nature of the heuristics suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=george+orwell+la+ferme+des+animaux+contexte+historique PDF link annotation
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/160a467ecda46f---37481238710.pdfIn PDF document text
    • https://impariant-club.ru/wp-content/plugins/super-forms/uploads/php/files/a9d1c25099097629cd6eb0a92f6233c8/fimovodaluvuzetamun.pdfIn PDF document text
    • https://anjingliar.com/contents//files/92994732457.pdfIn PDF document text
    • https://projectmine.hu/ckfinder/userfiles/files/19014485304.pdfIn PDF document text
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c775b37886b---dajozamibono.pdfIn PDF document text
    • http://rustproofingottawa.com/userfiles/file/66226941967.pdfIn PDF document text
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/7f27e078e4869c4756e1e3a626758761/fofekoviburulikinerisafun.pdfIn PDF document text
    • https://sygimportaciones.com/wp-content/plugins/super-forms/uploads/php/files/te3utds6elk51o5oqqtnel0jn8/19047369794.pdfIn PDF document text
    • http://naszymsladem.pl/upload/file/danafik.pdfIn PDF document text
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/16082c27bb6d95---29304942743.pdfIn PDF document text
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a676feda32f---41752155369.pdfIn PDF document text
    • https://tortugafilms.ca/adminfiles/file/70682137260.pdfIn PDF document text
    • http://xn--l3chcucnqd9c0eua7b1k.com/user_img/files/8034970823.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/1b67200a64012aa5f079d20aa3438f07/femewogejasijefev.pdfIn PDF document text
    • https://cooperspick.com/files/69726626261.pdfIn PDF document text
    • http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/16093b7859bbb0---54772680580.pdfIn PDF document text
    • http://newo.ru/files/files/84089696870.pdfIn PDF document text
    • http://webcertain.net/contentupload/fckeditorUploads/organization_/file/67875966744.pdfIn PDF document text
    • https://urbanplace.me/wp-content/plugins/super-forms/uploads/php/files/c738650264f3d8de4faff46067da3be8/61855305828.pdfIn PDF document text
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160ae76026bfee---4284024088.pdfIn PDF document text
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fd6944277a7---rodebuwij.pdfIn PDF document text
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1610dd110b3a52---42059146768.pdfIn PDF document text
    • http://buffagiuseppeinfissi.com/userfiles/files/56433948617.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_off00019e8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19E8C 19928 bytes
SHA-256: 5e4c05b8a0ac618f435419d69ecc817df7e3b3f20f6b1ee8f83248aae01b4cdb
font_01_sfnt_off0001d02c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D02C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001e843.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E843 11396 bytes
SHA-256: ac473bdbf1a8e20b12bffc06e57b1827380eb5611b17e7ad7a23ab34cf8745f1

Open this report in the interactive analyzer, or submit your own file for analysis.