Malicious PDF — malware analysis report

Static analysis result for SHA-256 3076bb52bc38f1f5…

MALICIOUS

PDF

85.8 KB Created: 2021-04-21 05:30:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 5ae87e1e058c4dcf3167dce8759b4dfc SHA-1: e8949dfd20defc48d8ba56995937f4c49e619ace SHA-256: 3076bb52bc38f1f5e2aab8dfc1d9b1e7e8664604147a8b6ab85cc2ca2750ce54
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a high risk score. It contains an embedded URI pointing to a suspicious domain, which is likely intended to host a malicious payload or phishing content. The document body, though heavily obfuscated, suggests a lure related to academic material to entice users to click the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://pelibifir.ru/strik?utm_term=topics+in+analytic+number+theory+rademacher+pdf PDF link annotation
    • http://danoguvu.medianewsonline.com/fashion_sewing_book.pdfIn PDF document text
    • http://lijasojaxivura.22web.org/xezedoredove.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bisofok.epizy.com/ejercicios_de_analogias_para_secundaria.pdfIn PDF document text
    • https://s3.amazonaws.com/fipijife/99188869438.pdfIn PDF document text
    • http://zuvineduwofuxo.epizy.com/favesimenugalilu.pdfIn PDF document text
    • https://s3.amazonaws.com/wifukedot/5665874134.pdfIn PDF document text
    • http://namepafubi.atwebpages.com/xozikovarobujedoranutajo.pdfIn PDF document text
    • https://s3.amazonaws.com/vavejijitatofu/how_to_be_a_3_man_audible.pdfIn PDF document text
    • http://bakesuli.epizy.com/notajoritulut.pdfIn PDF document text
    • https://s3.amazonaws.com/dogazisuze/what_is_peoples_republic_of_bangladesh.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d34f32df-0b32-471d-90ef-bf9ed1af8e2a/theme_of_the_joy_luck_club_by_amy_tan.pdfIn PDF document text
    • http://zogiken.rf.gd/bridge_house_school_uniform.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb3217d3-76b0-4220-8c83-d0cb8b4fdbc3/76869872397.pdfIn PDF document text
    • https://s3.amazonaws.com/xazarujokemus/pudixitefe.pdfIn PDF document text
    • http://tijadosib.epizy.com/regevaxixewomixuxase.pdfIn PDF document text
    • https://s3.amazonaws.com/gagagakigibapo/honda_small_engine_repair_shop_near_me.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fc98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC98 5588 bytes
SHA-256: b41a6c3123e7b5ac4bb7538eb1a39455f75cc376998198d08c0c7056735e565d
font_01_sfnt_off00010f69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F69 10612 bytes
SHA-256: 30803eba25ec7872ffc5df5db10b81f0242ffebf9954aa767dea847afeaa8081
font_02_sfnt_off00013376.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13376 16060 bytes
SHA-256: d1a84ba8f0e4a827a048d387db8dd5dae3538f1c7e72415b16af587a9947cdc7

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