Malicious PDF — malware analysis report

Static analysis result for SHA-256 f07616a6b8228c96…

MALICIOUS

PDF

82.5 KB Created: 2021-03-21 09:05:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 217f2559148bc0d31c8ab9d1184851d0 SHA-1: 80e7dac2b4e030079f45d867053ca3a97fcc995d SHA-256: f07616a6b8228c96de14b2c0418fce2c4c9ee01fdc07b210b8d3cf2959ebe53c
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by 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 0.9996

Heuristics 4

  • 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.
  • 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://xezojetit.ru/wix?keyword=10.4+cell+differentiation+worksheet+answers+pdf PDF link annotation
    • http://dokumenty-kiev.online/schlage_keypad_lock_lost_programming_codelotj4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368504/normal_5fe6ba64de62b.pdfIn PDF document text
    • http://nadurejiw.22web.org/josow.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479235/normal_6048c1708d246.pdfIn PDF document text
    • http://digitaloffice24.ru/cuntos_pies_tiene_un_metro_cuadradokwktg.pdfIn PDF document text
    • http://josigowuwerojov.iblogger.org/amitav_ghosh_sea_of_poppies.pdfIn PDF document text
    • http://rowajenuw.iblogger.org/89384996640.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://fezanigevuxuso.rf.gd/vizio_e40-c2_software_update.pdfIn PDF document text
    • https://49b7c339-fea6-4bb3-bf7b-ca47af5263df.filesusr.com/ugd/6ca12d_49596b05a51e47c89b9fe84cc5b18e64.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/ganubatebedoxez/bolulunewo.pdfIn PDF document text
    • https://s3.amazonaws.com/gumagabu/15824297155.pdfIn PDF document text
    • http://zifasodokid.epizy.com/watuvuziletafutuzuw.pdfIn PDF document text
    • http://niresadumave.rf.gd/electrolux_central_vacuum_dealers_near_me.pdfIn PDF document text
    • https://s3.amazonaws.com/kugelilizibuwum/vadizaxezulupu.pdfIn PDF document text
    • https://s3.amazonaws.com/gurowozenupifi/technical_writing_textbook.pdfIn PDF document text
    • https://ddd59a73-be73-4575-bd7b-2e5900175f8b.filesusr.com/ugd/5dc0ef_abed07034adf49aea966c40823c88cc2.pdf?index=trueIn PDF document text
    • https://2ed821ec-8078-4e74-b11b-c5cec6a88262.filesusr.com/ugd/65e777_95555815745045308253a7684bfcac8f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nowokil/1509041917.pdfIn PDF document text
    • https://504706c9-3a86-45eb-876a-6494ef133fff.filesusr.com/ugd/80c1db_687341f8c34a40c2870c642dfc92e670.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e34b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE34B 5408 bytes
SHA-256: e275e5c7facf5506beed87911a5b6b3f38d4784f0656ab07d92bfa992ef493e2
font_01_sfnt_off0000f5af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5AF 10628 bytes
SHA-256: 7048073c54af428ce41ec099af5ccc1f0f5569cd232b47536d469931683dbfce
font_02_sfnt_off000119a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119A1 16060 bytes
SHA-256: 2173a1880e9f774f759393e7d0d28dda91d04d8a3eae6bea41b822770b343b90
font_03_sfnt_off00012e38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E38 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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