Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fc891ba03e28f4c…

MALICIOUS

PDF

77.2 KB Created: 2021-09-18 11:56:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 2af9bb180c931334d5e839df3d7fef0c SHA-1: 84d1903759d128dc3070fcec1123cf8fb1169cbb SHA-256: 0fc891ba03e28f4c490cb44c4dcffaaa2a2556f8211fda34a653cece22d805cf
164 Risk Score

Malware Insights

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

This PDF was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains numerous links to compromised websites and disposable hosting, suggesting it's part of a link farm designed to redirect users to malicious content. The presence of a 'download button' heuristic further supports the attack pattern of luring users into downloading a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9943

Heuristics 7

  • 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.
  • 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://midospa.com/upload/files/lebazolofa.pdf In PDF document text
    • http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613bac33001dd---67072747767.pdfIn PDF document text
    • http://digitalpolicycouncil.org/imagenes/file/riguzen.pdfIn PDF document text
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/161340f0ce7602---xatifumosejokuno.pdfIn PDF document text
    • http://gccde.com/downloads/blog/geust/files/jifisosijegujifesuwomex.pdfIn PDF document text
    • http://vakantie-noordlimburg.nl/ckfinder/userfiles/files/wolemoge.pdfIn PDF document text
    • https://xn--80aaa1arbfjoe3bzh.xn--p1ai/data/files/51931364274.pdfIn PDF document text
    • http://cannamelis.com/userfiles/file/8680910329.pdfIn PDF document text
    • https://emotionalgift.com/ckfinder/userfiles/files/80301408948.pdfIn PDF document text
    • https://jagamimpi.net/contents/files/lirepa.pdfIn PDF document text
    • http://xn--80ab1a9a.xn--p1ai/sadm_files/disedexelu.pdfIn PDF document text
    • http://riverside-plaza.com/upload/userfile/files/19135993307.pdfIn PDF document text
    • http://mamnonsaokhue.vn/app/webroot/files/ckfinder/files/puxudoviwosofepamewepi.pdfIn PDF document text
    • https://gymlesgeants.com/upload/editor/file/semisumimaroz.pdfIn PDF document text
    • https://infotechsystemsonline.com/ital/www/img/file/46907758093.pdfIn PDF document text
    • http://www.jysunshine-hotel.com/up_files/file/94350985830.pdfIn PDF document text
    • http://xn--939a66v0zjo3bcvdmrp.com/data/ckfinder/files/kapevivujavefutitina.pdfIn PDF document text
    • http://valencia.thepokeluau.com/uploads/files/murilolibibegatitu.pdfIn PDF document text
    • https://www.heainc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613285793dcde---tevul.pdfIn PDF document text
    • https://piataafacerilor.ro/app/webroot/files/userfiles/files/67112296560.pdfIn PDF document text
    • http://thaiboxes.com/piceditor/file/78859496333.pdfIn PDF document text
    • https://mar3ol.com/Files/files/71847500111.pdfIn PDF document text
    • https://adminico.nl/userfiles/file/84017361211.pdfIn PDF document text
    • http://zoo-foto.cz/userfiles/file/jizov.pdfIn PDF document text
    • http://vouchertiket.com/airplane/ckeditor/uploads/files/79280163182.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=audreyar+xray+apkPDF 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_off0000ca5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA5C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e273.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE273 10148 bytes
SHA-256: 579a695ad3fac86d2f0059cd6f764f1d0e5c68e01aa4e96093e724072afd3bea
font_02_sfnt_off0000f940.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF940 17632 bytes
SHA-256: 2d52581614cec9416f354b4dc7fb82ff19f966a3bc47586f29f8a075aec6fdec

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