Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7ffed010bdf09e6…

MALICIOUS

PDF

74.2 KB Created: 2021-03-07 22:48:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: f3abb90df10a003b317c0f18817476c5 SHA-1: fa829f1c492e906efc29eb766ad2fb9a4f62c5e1 SHA-256: f7ffed010bdf09e62f4b106285ab5be80cdd4d1e3acfa69319ae38bea51899a6
104 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL that appears to be a lure for a fake software update, indicated by the 'wismec reuleaux rx2/3 update download' keyword in the URL and the presence of a visual download button heuristic. The document body, though heavily obfuscated, contains metadata consistent with a generated PDF, and the embedded URL is the primary indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://mezovuduw.ru/wix?keyword=wismec+reuleaux+rx2%252F3+update+download PDF link annotation
    • https://cdn.sqhk.co/jivumigen/OUKigje/71085857516.pdfIn PDF document text
    • https://cdn.sqhk.co/loxusovi/jat7mij/joder.pdfIn PDF document text
    • https://cdn.sqhk.co/fumodolanes/jCagdji/nda_exam_paper_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/litametun/jcje3hc/13273894453.pdfIn PDF document text
    • https://cdn.sqhk.co/xonepogafix/ermjeid/venaxebebebepepi.pdfIn PDF document text
    • http://waxinexedodupij.22web.org/data_antemortem_adalah.pdfIn PDF document text
    • https://cdn.sqhk.co/tititafoza/gdidgdm/table_tennis_racket_3d_model_free.pdfIn PDF document text
    • https://cdn.sqhk.co/pifonode/kidIfgj/29028719404.pdfIn PDF document text
    • https://cdn.sqhk.co/vajirasavuz/pwgisja/art_of_war_hero_list.pdfIn PDF document text
    • https://cdn.sqhk.co/zetikitor/bcIAxig/sosugokirupisif.pdfIn PDF document text
    • https://cdn.sqhk.co/tevunufoba/EgcgeMA/dijik.pdfIn PDF document text
    • https://cdn.sqhk.co/tamupoto/whjgjea/balls_vs_blocks_bricks_breaker_throw_apk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/f804d996-e1b0-433a-b4d8-26e0c3fd01af/jugugufozozolap.pdfIn PDF document text
    • https://s3.amazonaws.com/jidagafinuxesu/54181738321.pdfIn PDF document text
    • http://suwutosu.epizy.com/mobepulapakisakij.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54663b46-f914-40d3-a707-2b777bfabb92/kigejevanolasopaluvez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc0f1e4d-daee-4b6b-a9d4-41dcdc457039/very_hard_harry_potter_movie_quiz.pdfIn PDF document text
    • http://jaxudemavi.epizy.com/49424742607.pdfIn PDF document text
    • https://s3.amazonaws.com/mokamoba/aashir_wajahat_songs.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cdec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDEC 5608 bytes
SHA-256: 64ee006c94a5360bfa92ec012d25c0537f8536b996a21ef3038363221e9c4ba6
font_01_sfnt_off0000e0f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0F7 1800 bytes
SHA-256: a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620
font_02_sfnt_off0000e984.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE984 10340 bytes
SHA-256: 4adf710611f2141c7192ce08b25d0512407f896cba474a56c216803d581b1cb9
font_03_sfnt_off00010ce5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CE5 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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