Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a0e87d21629cac0…

MALICIOUS

PDF

69.2 KB Created: 2021-09-27 15:06:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 526d42a6e2c7a05bff2021fe131d4287 SHA-1: a60c90a6b2b19b657488657c0649e9f0717d2f18 SHA-256: 7a0e87d21629cac09cb66df27ed7875eb21312497423dfb5644452bcf25a0488
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to external PDFs hosted on disposable domains, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to a malicious site or download further payloads. No scripts were extracted, but the structure and URL distribution are indicative of a phishing or credential harvesting campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://abzesolar.com/uploads/files/tabidutokabumopev.pdf In PDF document text
    • http://permagnet.com/upload_files/file/2109200404474923812vrc5z.pdfIn PDF document text
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/a817eb4734eef5181faa5a38552baac3/25618719453.pdfIn PDF document text
    • http://malir-naterac.info/UserFiles/File/wufutegizukesexudina.pdfIn PDF document text
    • https://408of53crownstreet.com/assets/media/files/bodogi.pdfIn PDF document text
    • http://didopack.com/files/titixufowujivimuvininub.pdfIn PDF document text
    • https://rajnnuhiddje.se/userfiles/file/48738437914.pdfIn PDF document text
    • http://4darchitecture.org/img/all/21780296594.pdfIn PDF document text
    • https://habibitours.org/ckfinder/userfiles/files/lilisujaka.pdfIn PDF document text
    • http://www.vegagastro.pl/upload/file/57247301879.pdfIn PDF document text
    • http://www.mueblesgamez.com/ckfinder/userfiles/files/wapumivalitadunukoxokeva.pdfIn PDF document text
    • http://megat.pl/uploaded/fck_files/file/11600164645.pdfIn PDF document text
    • http://plechotice.sk/tmp/file/42641512624.pdfIn PDF document text
    • http://zgic.ru/!upload/files/21491071643.pdfIn PDF document text
    • http://parbatsamajjapan.com/img/files/files/pupepivuto.pdfIn PDF document text
    • http://www.galiantsolutions.com/emailimages/file/53623758600.pdfIn PDF document text
    • https://markmont.eu/editor_uploads/system/files/zowovabe.pdfIn PDF document text
    • http://goldstecq.com/userfiles/file/40943691037.pdfIn PDF document text
    • http://www.recko.ru/ckfinder/userfiles/files/xekopesejejotixuxulupov.pdfIn PDF document text
    • https://yourownadviser.com/ckfinder/userfiles/files/7340027845.pdfIn PDF document text
    • https://mintedimages.com/ckfinder/userfiles/files/10553093143.pdfIn PDF document text
    • http://cichanski.com/Upload/file/luzoloravotetagefo.pdfIn PDF document text
    • https://designclarf.it/file/basijekikozokike.pdfIn PDF document text
    • http://rivucota.com/upload/files/29959643685.pdfIn PDF document text
    • http://baltic-rt.ru/ckfinder/userfiles/files/gurog.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=cbse+9th+class+maths+bookPDF 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_off0000b0fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0FB 10628 bytes
SHA-256: 06c875f14938ee857f2adb3d384ea1590817304bdcd98e7ca3b866dc31d2a987
font_01_sfnt_off0000c967.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC967 15188 bytes
SHA-256: f1264b773d61af6241bebcb57755840fbc2c3336e503783f4404da262cd56ecb
font_02_sfnt_off0000ef69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF69 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1