Malicious PDF — malware analysis report

Static analysis result for SHA-256 8090025b127637e2…

MALICIOUS

PDF

79.4 KB Created: 2021-09-10 00:50:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-23
MD5: 091a27b81769cd0d21535730c2af12cb SHA-1: 03b7209ce57d78e991a97a784c54d5bc6e14bc83 SHA-256: 8090025b127637e25526fb8858c1458d8a3184a9398f5a7e047e5d018587e861
126 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://smidgel.ru/uplcv?utm_term=hexatech+mod+apk PDF link annotation
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f6ce8d28d6---levowafipidaretavorujo.pdfIn PDF document text
    • http://teamwork-poetschke.com/ckfinder/userfiles/files/119741005.pdfIn PDF document text
    • http://kidneytracker.com/ckfinder/userfiles/files/96501866815.pdfIn PDF document text
    • http://huucodatlanh.com/userfiles/file/vixejojugumudixatamaji.pdfIn PDF document text
    • http://www.macrolepidoptera.hu/userfiles/files/nanexenuninodo.pdfIn PDF document text
    • https://hsse.hssanesteban.cl/files/33438167424.pdfIn PDF document text
    • http://augustaelectricalwork.com/editorData/file/5786314729.pdfIn PDF document text
    • http://studioingegneriavaragnolo.com/userfiles/files/kifuvabiganisakakuros.pdfIn PDF document text
    • http://thenikharvconsultancy.com/userfiles/file/xigub.pdfIn PDF document text
    • http://bakineshr.az/ckfinder/userfiles/files/gotowesevaxa.pdfIn PDF document text
    • https://danielstrehlau.com/userfiles/file/21774207180.pdfIn PDF document text
    • http://sxcec.org/userfiles/file/68727529380.pdfIn PDF document text
    • https://ms2oke.com/contents/files/18561090688.pdfIn PDF document text
    • http://studioferrato.it/userfiles/files/66033569929.pdfIn PDF document text
    • http://yoga-privates.com/yoga-privates/file/vimozof.pdfIn PDF document text
    • http://sweatrinserepeat.com/ckfinder/userfiles/files/xujaligopasojasiped.pdfIn PDF document text
    • http://caythuocnam.org/images/files/towukalozivu.pdfIn PDF document text
    • http://candleelectricals.com/uploaded_files/userfiles/files/99825114937.pdfIn PDF document text
    • http://gfzgt.ch/upload/file/moxawanajipisufexuridu.pdfIn PDF document text
    • http://eternalcycle.com/FCKFiles/file/niwibadesepo.pdfIn PDF document text
    • https://diphong.com/uploads/rigafebenidowogudi.pdfIn PDF document text
    • http://dentalclinicbangalore.com/uploads/62332766442.pdfIn PDF document text
    • http://aimic.com/userfiles/file/jubemiwovuzutuwopidasap.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_off0000d31c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD31C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eb33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB33 10456 bytes
SHA-256: 258cb21f07b07fe90e2fbb0bbf3ec20db530c2bc7fb506caddb94a85dfc55f7d
font_02_sfnt_off000102e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102E6 17356 bytes
SHA-256: d0df9bab5ddb620890033fd8bc1a3c7e9fd6ce0836636ec8d22093372221020a

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