Malicious PDF — malware analysis report

Static analysis result for SHA-256 50c20e4841fc5d1f…

MALICIOUS

PDF

77.9 KB Created: 2021-03-23 07:47:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a91c89616ca9c0b9a5a68a11528b8a45 SHA-1: 7783c03ce42417ab83a47f5d10ec7ac702af86cc SHA-256: 50c20e4841fc5d1f31f99728ec6f0f38eebdf6dd696b425459a6110613115b6f
96 Risk Score

Malware Insights

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

The PDF file contains a heuristic indicating an external URI, specifically a URL related to creating fake birth certificates. This, combined with ML and ClamAV detections, strongly suggests a phishing or social engineering attack. The embedded URL is the primary indicator of the attack's intent, likely leading to a malicious site or further payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 4

  • 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://druttle.ru/wix?keyword=how+to+make+a+real+fake+birth+certificate
    • http://xisulekotitis.iblogger.org/child_labour_full_information_in_english.pdf
    • http://rofuxipof.mywebcommunity.org/dinamicas_de_integracion_para_adolescentes_catolicos.pdf
    • https://dademogu.weebly.com/uploads/1/3/4/5/134591834/gorowepaxarixuvij.pdf
    • http://rebitet.22web.org/ftir_spectroscopy_principle_and_working.pdf
    • http://wudebakafepi.mypressonline.com/how_to_run_c_program_in_android_phone.pdf
    • https://static.s123-cdn-static.com/uploads/4373788/normal_5fc7a5f8b7caa.pdf
    • https://static.s123-cdn-static.com/uploads/4485313/normal_5ff7e7d09b882.pdf
    • http://neriwor.medianewsonline.com/pifunigobaxuwasidebo.pdf
    • http://kevekozulanilim.sportsontheweb.net/4250733349.pdf
    • https://zikawudewodag.weebly.com/uploads/1/3/4/5/134585044/ragisifajav.pdf
    • https://cdn-cms.f-static.net/uploads/4499329/normal_5fdb17b6b200e.pdf
    • https://static.s123-cdn-static.com/uploads/4481403/normal_5ff64f5f9c1c6.pdf
    • https://duvigefotazepex.weebly.com/uploads/1/3/0/7/130775674/garexanepe.pdf
    • https://static.s123-cdn-static.com/uploads/4490725/normal_5fc5b577d6da7.pdf
    • https://fepavibubezi.weebly.com/uploads/1/3/4/6/134611462/23acf5987.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://lavapokapajemob.myartsonline.com/xifowamopafugefetu.pdf
    • https://s3.amazonaws.com/genijusemu/72430807222.pdf
    • http://semimuwido.epizy.com/95225089132.pdf
    • https://s3.amazonaws.com/pusori/carrier_30xw_water_cooled_chiller_manual.pdf
    • http://pidawuz.epizy.com/23002254061.pdf
    • https://s3.amazonaws.com/dinisemowoge/nesaneb.pdf
    • http://fewulagoxifi.epizy.com/babepilosotezekabuker.pdf
    • http://wudazebej.atwebpages.com/navy_eval_sample.pdf
    • https://s3.amazonaws.com/pezofut/xopazazof.pdf
    • http://tibamupebunod.atwebpages.com/brainstem_anatomy.pdf
    • https://s3.amazonaws.com/gafedupeba/mopanuvube.pdf
    • 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_off0000f397.bin
030340d312e347a603aae01777d5ea2f2e9f0c3fd05c1ca129390d39cb240bbb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF397 5200 bytes
font_01_sfnt_off00010531.bin
0ed349b87d8bfad7776e06caa2645ed923af63f58318b6f7b7c5510b0ec13091		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10531 10796 bytes

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