Malicious PDF — malware analysis report

Static analysis result for SHA-256 dece3d315c09a301…

MALICIOUS

PDF

76.4 KB Created: 2021-03-18 01:44:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b694d791d2a4406f0c6dd617b6eb615c SHA-1: cf01cde077db5bc2965b20bcbe224dcd6218d18d SHA-256: dece3d315c09a30100c3658c3e39ead66000211bf78eb87ace9a1a32bd41a8d1
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It contains numerous external links, with a primary malicious URL identified as 'https://gimoguvi.ru/wix?keyword=tools+dragon+city+2018'. The presence of a link farm suggests an attempt to manipulate search engine results or distribute malicious content. No scripts were extracted, but the PDF structure and link farm indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://gimoguvi.ru/wix?keyword=tools+dragon+city+2018
    • https://cdn-cms.f-static.net/uploads/4413227/normal_6011ef6f7e216.pdf
    • https://static.s123-cdn-static.com/uploads/4457857/normal_5fcc94ab17abc.pdf
    • https://cdn.sqhk.co/vakolitakap/eogdvXu/pixinabozumavox.pdf
    • https://cdn.sqhk.co/pekotegafod/NCT8jgP/chromatic_tuner_guitar_app.pdf
    • https://cdn.sqhk.co/tazakabebilo/Q9sifMZ/wordscapes_level_8212.pdf
    • https://cdn-cms.f-static.net/uploads/4372101/normal_603881f094245.pdf
    • http://lurubalopare.sportsontheweb.net/sony_bravia_32_inch_led_tv_price_amazon.pdf
    • https://cdn-cms.f-static.net/uploads/4381748/normal_603c7947c550a.pdf
    • http://zusagukitu.mywebcommunity.org/xovujonuwolafi.pdf
    • https://static.s123-cdn-static.com/uploads/4388041/normal_6000194c3f3bc.pdf
    • https://cdn.sqhk.co/sozovoja/iijhbWE/mastercraft_2020_x26_price.pdf
    • http://kidupat.getenjoyment.net/buku_tentang_pendidikan_agama_islam.pdf
    • https://cdn.sqhk.co/vobipibomuk/Y8vdtgs/baxaz.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/6e613e45-0bcc-4984-98ec-0d28e13cff1a/when_were_together_the_sun_is_shining.pdf
    • https://uploads.strikinglycdn.com/files/ef6d909c-2aab-4423-ae3f-6a68aeb67e1c/93866386632.pdf
    • https://uploads.strikinglycdn.com/files/17fa6810-22ba-48a4-b614-de376d34e4e6/what_are_the_books_of_the_new_testament_in_order.pdf
    • https://uploads.strikinglycdn.com/files/f45c5ab5-8d0c-4a54-959c-f1719f6f14b5/introduction_to_database_management_systems.pdf
    • https://bb74f61c-7045-47bf-9a7e-968101ee373e.filesusr.com/ugd/81ef4b_91b47e97770e4a52b51026f60722b34a.pdf?index=true
    • http://niwibobimitezof.epizy.com/bcs_question_bank_and_solution_download.pdf
    • http://bedozep.rf.gd/banff_centre_map.pdf
    • https://uploads.strikinglycdn.com/files/125fb9cf-95da-4401-a089-6942beaf9ce7/robolelaxetadekijorem.pdf
    • https://e905a76e-7bc1-418c-be29-e8eda1603e86.filesusr.com/ugd/3fb32a_12bc61e1cb584660885d2df03d641c54.pdf?index=true
    • https://6376acfe-5884-4251-b3d5-19a03c044549.filesusr.com/ugd/de3d83_76d3a85dee9e4d528a1f35463cfef0a8.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e898.bin
9d1f6ba01559e0cbca4685e048da1100001070cb76dc3dca3700e7b2a2676fbc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE898 5680 bytes
font_01_sfnt_off0000fc05.bin
86d8f99ff37f94c033ec423fa2aae71d22aeb78b68acc2d85fcbee499c41f15d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFC05 11276 bytes

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