Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ae464c03974544e…

MALICIOUS

PDF

86.5 KB Created: 2021-03-12 17:41:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: a8d401e5a1f808c08a5d3a779be4de97 SHA-1: 934ea96d5a98245e8d88e04a4377bbeb76e8327b SHA-256: 4ae464c03974544eb528f92cf53cf2155f27960e30845f6e429981750a9fc8f6
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

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 and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://soxebez.ru/123?utm_term=altova+xmlspy+2010+enterprise+edition PDF link annotation
    • https://wigufigavotafo.weebly.com/uploads/1/3/1/4/131452860/zorowuko-migitar-mimigiwet.pdfIn PDF document text
    • https://lemapemoj.weebly.com/uploads/1/3/4/0/134040436/7299678.pdfIn PDF document text
    • https://tilawifi.weebly.com/uploads/1/3/4/4/134480999/8012338.pdfIn PDF document text
    • https://vogapixafaroge.weebly.com/uploads/1/3/4/2/134234717/2a405267185.pdfIn PDF document text
    • https://fuxarudoniw.weebly.com/uploads/1/3/5/3/135350341/bexidopof.pdfIn PDF document text
    • https://nojinogexosop.weebly.com/uploads/1/3/4/6/134695112/307cd39.pdfIn PDF document text
    • https://wisapemewe.weebly.com/uploads/1/3/4/7/134713478/2793727.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://suvalomimo.atwebpages.com/vuniv.pdfIn PDF document text
    • https://s3.amazonaws.com/gofilafixu/47130204046.pdfIn PDF document text
    • https://27420876-d215-4860-9a72-f48db0d0c320.filesusr.com/ugd/4062c2_36a147a8717342b69a7fc10bf5c535ef.pdf?index=trueIn PDF document text
    • http://sufixis.myartsonline.com/abdominal_tapping.pdfIn PDF document text
    • https://s3.amazonaws.com/davolazupivowi/indonesian_to_english_dictionary_free.pdfIn PDF document text
    • http://kopolug.myartsonline.com/english_phrases_for_dummies.pdfIn PDF document text
    • https://89d9876f-4e47-4433-ab5b-8da47ae3ae5c.filesusr.com/ugd/37c326_80860d1d18c04c5e83bdb4650f825967.pdf?index=trueIn PDF document text
    • http://dozuxix.myartsonline.com/california_dmv_bill_of_sale.pdfIn PDF document text
    • https://4b523d79-2bc6-404f-8e52-0acae4d2cb03.filesusr.com/ugd/fe1b41_e36dba534e014081bceae3913b2c72f4.pdf?index=trueIn PDF document text
    • https://fa202315-5cd5-4006-9a99-7c5d4406650e.filesusr.com/ugd/61804c_81f172b84d9a4cd7a60d7bea321bbe95.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kewakuko/noxetibokewojor.pdfIn PDF document text
    • https://s3.amazonaws.com/purawuma/nixegivumesefugidokat.pdfIn PDF document text
    • https://s3.amazonaws.com/fuzafuzeruwit/ijazat_movie_hd_video_song.pdfIn PDF document text
    • https://09972071-4174-499b-90b1-de3619f59f53.filesusr.com/ugd/d1c05f_4f2600e58fd8416b8203cf311ff504ab.pdf?index=trueIn 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://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dfb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFB6 2856 bytes
SHA-256: 2cdd336d4ad4698270d9077a3b8ade5aca6d4decd0916d5d918882b18b5a1806
font_01_sfnt_off0000e9e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9E1 5648 bytes
SHA-256: 45bbaf26bdacf30f3b2f0dd6ceaceeef7ccda29b685a415074cd4bd23ffdbe61
font_02_sfnt_off0000fd11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD11 1952 bytes
SHA-256: 354c2586e1320f36d4abb6820ff89fb28b1a1a900af4deb63b051efb98b79229
font_03_sfnt_off00010678.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10678 17656 bytes
SHA-256: 6ca74a2fb933acc34acc07f85fab767c3a65c4451ff83564e9042f87f39259c8
font_04_sfnt_off000133db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133DB 16344 bytes
SHA-256: f3b95f1269985bafc3dfb9b5b35e76df8a4d57039a143c013aed99c7cf3a4a89