Malicious PDF — malware analysis report

Static analysis result for SHA-256 3468783aaae0d0da…

MALICIOUS

PDF

117.7 KB Created: 2021-05-25 03:24:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 7a024577b422141cfdf99472fa881af1 SHA-1: 156ec5c37825ea33c30afa59fcf5fba3d7c2197a SHA-256: 3468783aaae0d0da925f86291bdf48086874204ee1a8961e85e7c0366756249d
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, with a critical heuristic identifying it as a PDF link farm. One of the primary external URIs, 'https://xezojetit.ru/strik?utm_term=how+to+spend+gold+adventure+capitalist', is flagged as suspicious. The ML classifier and ClamAV also strongly indicate maliciousness, suggesting the document is designed to redirect users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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 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/strik?utm_term=how+to+spend+gold+adventure+capitalist PDF link annotation
    • https://jerupixudenaxi.weebly.com/uploads/1/3/1/4/131437293/gitaredujatu.pdfIn PDF document text
    • https://gajuleli.weebly.com/uploads/1/3/1/8/131871701/binoz-bixokulesoxabu.pdfIn PDF document text
    • https://lofokuvowuvi.weebly.com/uploads/1/3/4/3/134362742/2812616.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/gofiguj/liwezevedumupukori.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4e9ec73-4bad-4055-8917-e3d506af5573/25441605187.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a880dc1-f8d7-4f44-894a-21fdaa4c35c4/31632184226.pdfIn PDF document text
    • https://s3.amazonaws.com/garorowa/how_to_build_a_drone_for_beginners.pdfIn PDF document text
    • https://s3.amazonaws.com/papuja/gajivupebatuwonew.pdfIn PDF document text
    • https://s3.amazonaws.com/rumezo/girl_boss_cast_nathan.pdfIn PDF document text
    • https://s3.amazonaws.com/sajezife/does_an_instant_pot_replace_a_slow_cooker.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3dbc4ec9-7891-4b64-8eba-134275775328/xisedativenesagevelelupan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b2e3386-ea86-48df-8044-f87175d0f04a/xobokepilaxij.pdfIn PDF document text
    • https://s3.amazonaws.com/wuxupewu/cuco_chiquito_album.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f0aedd0-016a-461b-a683-5239d09159b7/fifugof.pdfIn PDF document text
    • https://s3.amazonaws.com/rowubunak/hungry_shark_evolution_android_2._3._6.pdfIn PDF document text
    • https://s3.amazonaws.com/paropabaru/46649437861.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8efb98e6-c2e0-4763-a3da-3390684ed353/dojibebarawaduz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/961c4e48-7c70-4ba2-abfb-e57ea7ad753f/best_book_pema_chodron.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25a3cbce-b092-4848-97f3-6b9391f4a4c5/kefepor.pdfIn PDF document text
    • https://s3.amazonaws.com/viromibukoleliw/photo_banner_app_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52098524-b18c-45c2-861e-472d09bee968/zagg_folio_for_ipad_pro_9.7_backlit.pdfIn PDF document text
    • https://s3.amazonaws.com/muvazi/nesikobuxajetumokivujomi.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00017b8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17B8E 4708 bytes
SHA-256: 6780f830d2d1850ffed31360c765e29f8063d71742e4fd0aa3c9d733031e0809
font_01_sfnt_off00018c05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18C05 5356 bytes
SHA-256: efd3f9ec26029c373987023ec97f96ef5d4eee773128a2a3877a5cda7cb23222
font_02_sfnt_off00019e61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19E61 12792 bytes
SHA-256: a33ad87cb62a4648cca75e4f9a394504fdc002260ba86603dbe11c6f93e88f54

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