Malicious PDF — malware analysis report

Static analysis result for SHA-256 0382228de7d5578b…

MALICIOUS

PDF

84.6 KB Created: 2021-09-04 17:34:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 65c8cdfcc2f137d02e82b30fdfcff85b SHA-1: f98940fa9bf795c397ecee5ead3ab83365e2db64 SHA-256: 0382228de7d5578b840e2c5f681525cdc6cac9e1b476555e10b041d15ded66e4
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 websites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery through these links. No scripts were extracted, and the document body was unreadable, so the analysis relies on the URL heuristics and threat intelligence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://www.audioclinica.pt/wp-content/plugins/super-forms/uploads/php/files/d8amsorkf4uvo1isg59t2ote1r/wenumereborig.pdf In PDF document text
    • http://xahscw.com/userfiles/file/fopemididev.pdfIn PDF document text
    • http://bkm-market.net/userfiles/file/77954970830.pdfIn PDF document text
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076af6b90306---wajepazosurezopidesiwidax.pdfIn PDF document text
    • http://csc0535.com/userfiles/file/20210820005143_tzgivp.pdfIn PDF document text
    • https://ascend.sut.ac.th/ce/2017/src/plugins/ckfinder/userfiles/files/40560822120.pdfIn PDF document text
    • http://stallingreunion.com/clients/a/a3/a37dbb3dca22f8cb40f44de83fe48269/File/refosusotaremu.pdfIn PDF document text
    • http://konferencii.org/web/uploads/assets/file/virurokulasodujinitaw.pdfIn PDF document text
    • https://northstarexecutivesearch.com/wp-content/plugins/super-forms/uploads/php/files/a6cb5a912ddaf6fe993e206a99336e25/88408621174.pdfIn PDF document text
    • http://eventcompany.org/clients/e/e3/e30ef11cf4efe639fe6592aa37b9cb94/File/zupobobalapabepiza.pdfIn PDF document text
    • https://assignmentmart.com/ckfinder/userfiles/files/77884836691.pdfIn PDF document text
    • http://ceomit.com/fckupload/file/63366372808.pdfIn PDF document text
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/1607d86d604a7d---74298320333.pdfIn PDF document text
    • http://hitecds.com/userfiles/file/27509349730.pdfIn PDF document text
    • http://pagyesa.org/userfiles/file/20210801191419.pdfIn PDF document text
    • http://fratellilongoni.com/userfiles/files/bofajalu.pdfIn PDF document text
    • https://asthasupermarket.com/userfiles/file/6193301961.pdfIn PDF document text
    • http://jucal.es/images/file/27133021655.pdfIn PDF document text
    • http://theettiaresottawa.com/clients/e/e8/e8f54e69a7463df9fd0adff13cd8e90f/File/88489303568.pdfIn PDF document text
    • http://thebankcardservices.com/uploads/files/gadekimidagexel.pdfIn PDF document text
    • http://resortvillairene.it/userfiles/files/gogumosawixaxukikuj.pdfIn PDF document text
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f29161b788---badisok.pdfIn PDF document text
    • http://coachhouse.info/assets/file/logiwugepoxije.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=kitchenaid+ice+cream+maker+instruction+manualPDF 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_off0000e54a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE54A 10820 bytes
SHA-256: c1d91d839fd7cb4a4816e7da684ffe04e824c7d87185db86b5274cbd06852a39
font_01_sfnt_off0000fe0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE0D 18136 bytes
SHA-256: ec2a859ce4679ac42ef55ad07a689974cb92f80ceb1bb1fa435a8ed8a074151e
font_02_sfnt_off00012c98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C98 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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