Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7baa5928142edd7…

MALICIOUS

PDF

85.5 KB Created: 2021-09-06 04:09:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: e7617d98aaf8195b85368f4efd94d93b SHA-1: 0e85931e34256494bfcc211ac8aebaf9eddae011 SHA-256: d7baa5928142edd7ae3131531509b6d51123df809364a48116735419b75ac037
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload directories or disposable hosting, indicating a link farm designed to distribute malicious content. The ClamAV detection and ML classifier strongly suggest a phishing or trojan payload is intended. No scripts were extracted, but the structure and URL patterns are indicative of a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://chcial.ru/uplcv?utm_term=communication+skills+resume+pdf PDF link annotation
    • http://radiosalsa.fr/php/rs/filesupload/file/21705615776.pdfIn PDF document text
    • http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c19acf52cd1---rebaremofiwabalomamivug.pdfIn PDF document text
    • http://strandedtattoo.net/file/konigugoji.pdfIn PDF document text
    • https://hoovermaids.com/wp-content/plugins/super-forms/uploads/php/files/ff813d375a0aa3942243fc2f3e5d07a3/vegozenadawenawuf.pdfIn PDF document text
    • https://sportnazona.bg/f/uploads/files/faludojikipixe.pdfIn PDF document text
    • https://canvasations.com/wp-content/plugins/super-forms/uploads/php/files/f3a57faa0643cca679dc5decedd9e2ee/tiritosut.pdfIn PDF document text
    • http://dogalakustik.com/depo/sayfaresim/file/zijonepusuvulepuworulumod.pdfIn PDF document text
    • http://puzynowska-kancelaria.com/userfiles/file/semodegupijesafupatuke.pdfIn PDF document text
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/71e6f73c0f0a228d2da7e5a18afed16d/27252882247.pdfIn PDF document text
    • http://50wj66.com/clients/a/af/af9d65f11c1965a5434adcd4cd578f00/File/28524459914.pdfIn PDF document text
    • https://realestateconnect.pro/wp-content/plugins/super-forms/uploads/php/files/aopmhpvfo3h0tcvt7hjik1ie16/mujizekobulaw.pdfIn PDF document text
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d1ddf38c83b---43609699276.pdfIn PDF document text
    • http://obkladacstvikolar.com/content/13054050454.pdfIn PDF document text
    • https://remoteyourstaff.com/calisma2/files/uploads/jajozokafo.pdfIn PDF document text
    • https://rkdestate.com/userfiles/file/2380944691.pdfIn PDF document text
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c5ca5d53d4---siwuvewek.pdfIn PDF document text
    • https://antoinepanau.com/wp-content/plugins/super-forms/uploads/php/files/0d2e22d2e840eb2cc69e2affb435522c/xibifa.pdfIn PDF document text
    • http://immobiliareborghi.com/userfiles/files/98666133577.pdfIn PDF document text
    • https://toananhmedical.com/uploads/files/momuzu.pdfIn PDF document text
    • https://barrierball.cl/ckfinder/userfiles/files/53329333276.pdfIn PDF document text
    • http://dailitara.lt/bites/uploads/file/gosozenotizufed.pdfIn PDF document text
    • http://hillsdale66ersreunion.com/clients/c/c6/c679c52642bc64dd8629b98fb95ccc77/File/wesexajavozipumebi.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA8E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000102a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102A0 17360 bytes
SHA-256: f7bc014830b96c042125d471e0957bd7fff5c045831c2fc74de783b59ad255a0
font_02_sfnt_off00012f05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F05 11004 bytes
SHA-256: b6a1624b9a417ac8f584705b6791d3b0b8841126d56ac26aa85cfe5d034317c2

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