Malicious PDF — malware analysis report

Static analysis result for SHA-256 72624dac75235b22…

MALICIOUS

PDF

80.4 KB Created: 2021-10-09 00:29:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 0047a72a66033d1119638d622fb3659a SHA-1: b5accb717054a6bc4be278053fdfffc2761eb7ff SHA-256: 72624dac75235b22fec84d221a6fd14e30f46c65459eb9872696792921bc339b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The sample is a PDF file identified as malicious by ML classifiers and ClamAV. It contains numerous embedded URLs that point to various domains, suggesting it functions as a link farm. The presence of compromised CMS upload links and disposable hosting indicates a likely phishing or malware distribution scheme. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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://nomylo.ru/uplcv?utm_term=4+ounces+to+mg PDF link annotation
    • https://horkolas-gatlas.hu/ufiles/file/zekabipepurodeta.pdfIn PDF document text
    • https://sistemagestiondpr.co/userfiles/file/38191935371.pdfIn PDF document text
    • http://joyearland.com/ckfinder/userfiles/files/nonakuvokapuvokuvawusun.pdfIn PDF document text
    • http://energy-labels.com/userfiles/file/kidopifudexezafereper.pdfIn PDF document text
    • http://duhochoangthanh.com/upload/files/bojanaxojitunerib.pdfIn PDF document text
    • https://taperagi.com/contents/files/zolepubepa.pdfIn PDF document text
    • http://grupomarsamo.com/wp-content/plugins/formcraft/file-upload/server/content/files/161446db73a773---ziwetaje.pdfIn PDF document text
    • http://meble-tk.pl/userfiles/file/kupupefurek.pdfIn PDF document text
    • http://familie-schiecke.de/images/file/pitogefodorusezix.pdfIn PDF document text
    • http://bkmarine.net/ckfinder/userfiles/files/1632901716.pdfIn PDF document text
    • http://pro-group.ru/userfiles/file/sirasovedasaru.pdfIn PDF document text
    • https://www.vigo.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/161518d2237f5a---10621438648.pdfIn PDF document text
    • http://rcsiprojectracker.com/userfiles/files/59567318079.pdfIn PDF document text
    • https://bahamianbrewery.com/ckfinder/userfiles/files/sabotakovisemuger.pdfIn PDF document text
    • http://clubselectionvoyages.com/images/file/36635614876.pdfIn PDF document text
    • http://jamalcar.com/userfiles/file/36392524947.pdfIn PDF document text
    • https://taperagi.com/contents/files/60346566450.pdfIn PDF document text
    • http://materialdeestudo.top/userfiles/files/ketulalodimezarawarivuk.pdfIn PDF document text
    • http://www.diplomat2014.ru/ckfinder/userfiles/files/87498664750.pdfIn PDF document text
    • https://tolgyesvolgy.hu/userfiles/file/90561090624.pdfIn PDF document text
    • https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/ugkdciio6gu65ae9h52915lf07/34561537996.pdfIn PDF document text
    • https://cokhivietuc.com/img-vietuc/files/nigame.pdfIn PDF document text
    • http://dryoucosmeceutical.com/userfiles/files/xorufezu.pdfIn PDF document text
    • https://parklanehotel.asia/userfiles/file/1278537376.pdfIn PDF document text
    • http://srilakshmienterprises.net/uploads/zonosizivike.pdfIn PDF document text
    • https://forssah.co/userfiles/file/59012010956.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_off0000d551.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD551 10256 bytes
SHA-256: 28e306dd0da2f7065e8ac998d39be75b4247f227802218d14d6fc99f9df9b992
font_01_sfnt_off0000ec70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC70 18656 bytes
SHA-256: 686da39242acee3b5edba4b1d5d28dc1b5cced6355ed0dd2243ce9b22f64f661
font_02_sfnt_off00011c39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C39 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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