Malicious PDF — malware analysis report

Static analysis result for SHA-256 50f11f504a6167ea…

MALICIOUS

PDF

83.1 KB Created: 2021-03-14 04:47:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: a24303bf3fb6359c1be21600192e3e38 SHA-1: 9972804957364495853ee194c60c34726f6ef86d SHA-256: 50f11f504a6167ea66b6965bcdf3af3dafe4a3f44f95433533a0cd11887bd2fb
126 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that redirects to a page offering a "bio data format for job pdf download", indicative of a phishing or scam lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the presence of external URIs and the document's deceptive content point towards a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://leonvi.ru/award?keyword=bio+data+format+for+job+pdf+download PDF link annotation
    • https://jajipovel.weebly.com/uploads/1/3/4/5/134527293/gixogamorodovovexoz.pdfIn PDF document text
    • https://cdn.sqhk.co/xumupojamax/gghicpl/34038726392.pdfIn PDF document text
    • http://ledozikatiresev.scienceontheweb.net/binary_options_learning.pdfIn PDF document text
    • https://torevoxun.weebly.com/uploads/1/3/2/7/132712334/1154516.pdfIn PDF document text
    • http://dawezedelofeda.scienceontheweb.net/mamiburobukarojafog.pdfIn PDF document text
    • https://cdn.sqhk.co/jonilinenuvo/zxq5jgD/bedafaf.pdfIn PDF document text
    • https://cdn.sqhk.co/suwojixuwebi/i17NhgT/my_kutty_movies_collection_2015.pdfIn PDF document text
    • https://garugufalavul.weebly.com/uploads/1/3/4/5/134507034/neruvin-fokudiwekulev-wuzopusuwomiv-tulokubopufew.pdfIn PDF document text
    • https://cdn.sqhk.co/busumodofu/dsijhdL/snake_plant_benefits_nasa.pdfIn PDF document text
    • https://cdn.sqhk.co/dugixikisim/gGigOja/granny_smith_apple_recipes_low_calorie.pdfIn PDF document text
    • https://cdn.sqhk.co/wuladupuzo/HghTarj/wakut.pdfIn PDF document text
    • https://cdn.sqhk.co/vobevufubito/Fhehhfj/boat_wallpaper_hd_free_download_for_mobile.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://de99c131-68bf-4271-bcef-cda292486844.filesusr.com/ugd/f5892c_c2477592a50743e5bd4e71cf2fdac252.pdf?index=trueIn PDF document text
    • https://efed9c07-4553-4484-a419-1b844d271aeb.filesusr.com/ugd/6f475a_cb78c81972de45568b5bf9f72c37bd8a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wogikokuzotaxa/aptoide_android_market.pdfIn PDF document text
    • https://45dcde1a-aed5-4138-b95e-a0f768a283bf.filesusr.com/ugd/89441e_988e79cabefb4637abc5c94461335b50.pdf?index=trueIn PDF document text
    • https://ac3db616-04cb-40f1-8357-c67041f5e20c.filesusr.com/ugd/eda9ba_220e47453c4444e1acf71fa1c73e7987.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jonora/does_walmart_pay_more_for_night_shift.pdfIn PDF document text
    • https://24a70dd4-b549-4b9e-9c0a-6eea45ab85ad.filesusr.com/ugd/ab0c63_4627598fa8d54520ac58876bc56f3919.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010705.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10705 5368 bytes
SHA-256: 3a1a24c5ef97aa44d640e7b703adac33daca6c931691410e054b18da46d50b3b
font_01_sfnt_off00011945.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11945 11128 bytes
SHA-256: cc3e1b626e3633f11e591ef0583c0a32d3ae6ab169192d6dcae6e6b80e0b207d

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