Malicious PDF — malware analysis report

Static analysis result for SHA-256 173312d617704a23…

MALICIOUS

PDF

81.1 KB Created: 2021-02-09 07:02:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 78beb7a8cd8c08353b7e7445dece845d SHA-1: 61f4bfa51225d85289a67d6222cd3e02712a2ce2 SHA-256: 173312d617704a2300cb142f719b0dcd0d64e8206d94a26634c54cb3754556cf
102 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://yafferge.ru/aws?utm_term=amores+perros+movie+free'. Additionally, a heuristic indicates the presence of a visual download button lure. The ML classifier strongly flagged this PDF as malicious. While no scripts were extracted, the combination of the malicious URL and the download lure suggests an attempt to trick the user into navigating to a malicious site, likely for further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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://yafferge.ru/aws?utm_term=amores+perros+movie+free In PDF document text
    • https://cdn.sqhk.co/bidusowo/6iiVhZ1/11075822943.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384835/normal_600ea0a6c7741.pdfIn PDF document text
    • https://cdn.sqhk.co/zodenizekija/TjaeVyY/simanuvidarujusuveropapef.pdfIn PDF document text
    • http://radanews.site/sotijilexivefabipkqzkc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476273/normal_600fab5d62b18.pdfIn PDF document text
    • http://fruit-ital.space/bayesian_probability_for_babiesmzpb2.pdfIn PDF document text
    • http://kidunotofonaxiz.22web.org/misetewalanebivogutu.pdfIn PDF document text
    • http://besemafobekilir.22web.org/video_from_link_online_free.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416132/normal_6007a6ea0ea97.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383679/normal_5fe8361e3a341.pdfIn PDF document text
    • http://idslim-italia.site/20140595958q48c6.pdfIn PDF document text
    • https://cdn.sqhk.co/kikolibub/12jageh/south_african_national_defence_force_vacancies.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
    • https://s3.amazonaws.com/jasadavebaga/29417588312.pdfIn PDF document text
    • https://s3.amazonaws.com/sefipa/bridge_load_test_report.pdfIn PDF document text
    • http://pudubekij.epizy.com/ayuntamiento_de_las_palmas_telefono_informacion.pdfIn PDF document text
    • https://s3.amazonaws.com/sakaburepagase/turkish_march_piano_sheet_music_easy.pdfIn PDF document text
    • https://s3.amazonaws.com/jikopot/mulefugodadaze.pdfIn PDF document text
    • https://s3.amazonaws.com/fikuvine/audiophile_music_player.pdfIn PDF document text
    • http://pasabepudibupe.epizy.com/carnivores_dinosaur_hunter_reborn_android.pdfIn PDF document text
    • http://wadatenut.rf.gd/41679297490.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://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_off0000dce3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCE3 4456 bytes
SHA-256: b4e09b8fc597301cc7fc65e748f9c2793abe672b885b0027a4c16cb780d59cdf
font_01_sfnt_off0000ebff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBFF 11856 bytes
SHA-256: cec3697a1199a7aa7a4192f008dcd3103fface997cee37d6fdfefa22786a5444
font_02_sfnt_off000113ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113BA 16180 bytes
SHA-256: 94ce6c23bc4f3539b9d4d7afa6906a6fbbda9601d230f82cc73a39c5c386948a
font_03_sfnt_off000128e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128E2 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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