Malicious PDF — malware analysis report

Static analysis result for SHA-256 39020091f2e526f2…

MALICIOUS

PDF

85.1 KB Created: 2021-06-30 07:57:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 74d07bba1c4fdf571bef75ac585d21cd SHA-1: 117e93ec4a30eb2462ffc19a2de0764618f89ede SHA-256: 39020091f2e526f20779176e32d5d8fa32e872b1ddc463a869ac41618e3e57fe
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier with high confidence. It contains numerous links, many pointing to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of multiple external URIs and the nature of the linked domains indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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 http://phillipwhiting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9bde0328e8---zivapovufej.pdf In PDF document text
    • https://elitstroycraft.ru/source/file/60029818590.pdfIn PDF document text
    • http://wwpokebar.com/uploads/files/dejenasonasixadevariv.pdfIn PDF document text
    • http://yonseri.org/userfiles/files/redivubaberefedupinapiv.pdfIn PDF document text
    • http://rheinmotel.com/userfiles/file/30393723028.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/c7e992d7ffb65fe0a4b76fa89d4bb608/jowulubepazadamonixatoxef.pdfIn PDF document text
    • http://score1forspencer.com/clients/4/45/4587145e2679cb7673d0e21b436e5c25/File/11654503672.pdfIn PDF document text
    • https://www.rockandroll.blog.br/wp-content/plugins/super-forms/uploads/php/files/2rsr9atm32u93gmjqle8e9ua7d/papegaxotidafetawakal.pdfIn PDF document text
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160b358b0787c7---xasitemazisipumeripolul.pdfIn PDF document text
    • https://www.servicioscalibrados.com/wp-content/plugins/super-forms/uploads/php/files/89e81e645c6e45e27b33f3518b4c3dd0/ripasamibugiz.pdfIn PDF document text
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609a29bcb9730---93270278499.pdfIn PDF document text
    • http://donghocasiochinhhang.net/uploads/userfiles/file/vawexovuvasa.pdfIn PDF document text
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/1a9afaf9ab9f59ecf0039c3e02eb0258/40768213720.pdfIn PDF document text
    • http://ixtvs.de/_upload_bilder/_filemanager/file/34112478980.pdfIn PDF document text
    • https://revapackers.com/wp-content/plugins/super-forms/uploads/php/files/h2bgo3gelof08spuqg2sfb2uf5/getosuginolex.pdfIn PDF document text
    • https://gamaconsultores.cl/upload/file/nexedarefipeta.pdfIn PDF document text
    • https://volgogradexpo.ru/ckfinder/userfiles/files/39951459331.pdfIn PDF document text
    • https://technok.cz/wp-content/plugins/super-forms/uploads/php/files/9a079a88f2d22600f754c8b6f1606a34/86595872842.pdfIn PDF document text
    • https://www.northwoodmedical.ca/wp-content/plugins/super-forms/uploads/php/files/b70q581phc8amc8eb2v69psnrd/vujujunipifotug.pdfIn PDF document text
    • http://cestovni-postylka.eu/userfiles/file/tagubuwenomozujiwada.pdfIn PDF document text
    • http://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/grsea90f23cumidktu0lvnq3jg/76976403697.pdfIn PDF document text
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/160986b43a63e5---levixonimel.pdfIn PDF document text
    • http://www.toptehnik.si/images/21705268131.pdfIn PDF document text
    • http://banghaija.com/userfiles/file/53860322069.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=vlookup+formula+to+compare+two+sheetsPDF 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

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_off0000e946.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE946 10796 bytes
SHA-256: 2226d5b1c359799b2d6d4e2e4cf6c0aad3e012d437448d7c5f27a91da301a7f4
font_01_sfnt_off00010251.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10251 17196 bytes
SHA-256: c24bf8ff619a21018e8f53b2b26e294a3a094ff5b4a8c39367b65dc95c054fc2
font_02_sfnt_off00012f16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F16 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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