Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed909c91740dfcc4…

MALICIOUS

PDF

88.5 KB Created: 2021-07-18 01:03:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: daa4f82ea929ddc6fbb1b0b55b0d1f8e SHA-1: b78d7c1925a3c35538599354030b15955f6c274e SHA-256: ed909c91740dfcc482a12ef0802f57e9c8470643b078f53a39d63231e0ddbc22
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs that point to external resources, some of which are hosted on compromised CMS uploads or disposable domains. The primary purpose appears to be directing users to potentially malicious websites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://efficimm.fr/userfiles/files/zapajotegojuzopokevi.pdf In PDF document text
    • http://bfr-bialapodlaska.pl/userfiles/file/letadabokov.pdfIn PDF document text
    • http://onellenorzes.com/uploads/files/pawesoviwurovimasuxukabum.pdfIn PDF document text
    • https://pasarantogel2.com/contents//files/87872808396.pdfIn PDF document text
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa5b92c6509---2511054641.pdfIn PDF document text
    • http://wenxuezj.com/images/File/zewoxelozivepixejataxev.pdfIn PDF document text
    • https://www.marbelitesa.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16082c83288a31---27893120663.pdfIn PDF document text
    • http://ventilatoryzlin.cz/images/file/sobuzakarelawinojig.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/a4rthd0plj6vmtjiadpdcpuqn5/ranekaxufunigofemafe.pdfIn PDF document text
    • http://mgocsm.in/userfiles/file/1808654835.pdfIn PDF document text
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/dfc632e0542feab2fa96d983b72d50b7/99169238783.pdfIn PDF document text
    • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/160838f0142ab5---tefuwoluzuvotupiga.pdfIn PDF document text
    • http://alituncer.com/userfiles/file/93433919746.pdfIn PDF document text
    • http://duonglaohanoi.com/userfiles/file/92258803732.pdfIn PDF document text
    • http://alphabodysupplements.com/newerac2c/userfiles/file/kogebuvudozufimekamed.pdfIn PDF document text
    • http://flatadministration.com/uploades/fckeditorfile/nofusegeviboradixiveb.pdfIn PDF document text
    • http://stacjaregeneracja.pl/userfiles/file/67203931737.pdfIn PDF document text
    • https://nusantarabet4d1.com/contents//files/85427205108.pdfIn PDF document text
    • https://adasms.fr/userfiles/file/10024189726.pdfIn PDF document text
    • http://vaness-sens.fr/ckfinder/userfiles/files/gutuwaseko.pdfIn PDF document text
    • http://redigonda.it/userfiles/files/pugebariwibavider.pdfIn PDF document text
    • http://www.asejnrtigers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608125483e731---xumanipukasirodot.pdfIn PDF document text
    • http://dom-nenilovo.ru/wp-content/plugins/super-forms/uploads/php/files/bdcbe2db4d82b611936ccd8399250cc3/sazojepenedowadifinaze.pdfIn PDF document text
    • http://goldnumber.info/userfiles/file/wegalonamomonofijozave.pdfIn PDF document text
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e6bc7f8a480---62704554045.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=should+resume+work+experience+be+in+past+tensePDF 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_off0000f1d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1D2 17780 bytes
SHA-256: f2cce245fbc9be2778d8a617f3566a6c07498b363f5307e9d8948f293fdba156
font_01_sfnt_off00012045.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12045 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001385c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1385C 11376 bytes
SHA-256: fdc1186ea37bbe4a1959955275613a846ac4458287156ca52a6fb154a555ce00

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