Malicious PDF — malware analysis report

Static analysis result for SHA-256 4876f5364f2265c9…

MALICIOUS

PDF

73.6 KB Created: 2021-03-07 05:21:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 51ff1a0d49c05362f3020372c344bef2 SHA-1: 02d50a019f81bfd7810271e8b8cd627f8543d278 SHA-256: 4876f5364f2265c9838f30670adbec509314ce597306701cfc6d7e85c0f7705e
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL pointing to a suspicious domain. Heuristics indicate this is a phishing attempt, likely to trick the user into visiting the malicious site for further compromise. The ML classifier and ClamAV detection strongly support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://mezovuduw.ru/strik?utm_term=does+kyocera+have+a+sim+card PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4374002/normal_5fd158a2587c5.pdfIn PDF document text
    • https://cdn.sqhk.co/nebafori/oLpZiae/94885704077.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393044/normal_6012febc3ce4b.pdfIn PDF document text
    • http://lazotub.mywebcommunity.org/77133236737.pdfIn PDF document text
    • http://5coupon.info/adobe_indesign_cs6_for_windows_7wk4k4.pdfIn PDF document text
    • http://bafiselavanebep.mywebcommunity.org/nofivavix.pdfIn PDF document text
    • http://memowelubi.mygamesonline.org/is_there_video_on_google_classroom.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393754/normal_5fcb7d85aa1be.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453129/normal_602ed866dc599.pdfIn PDF document text
    • http://winoorama.fun/exion_hill_racing_mod_apk_unlimited_moneyg8ogn.pdfIn PDF document text
    • https://cdn.sqhk.co/lagexodefajo/ejcJfie/audiometria_valores_normales.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413976/normal_600317a46c1c6.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/potamotaz/adaalat_episode_55.pdfIn PDF document text
    • https://s3.amazonaws.com/rutufokedizon/lezegevukumabav.pdfIn PDF document text
    • https://s3.amazonaws.com/poresi/armitron_watch_manual_pro_sport.pdfIn PDF document text
    • https://s3.amazonaws.com/dabatisew/litowin.pdfIn PDF document text
    • https://s3.amazonaws.com/zuwosil/98626385036.pdfIn PDF document text
    • https://s3.amazonaws.com/tolivajupeku/searchview_example_in_android_studio.pdfIn PDF document text
    • https://s3.amazonaws.com/fewifuwu/animated_knots_grog_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/zuvovoxigumuz/74490783612.pdfIn PDF document text
    • http://pabewuvuxaf.onlinewebshop.net/10546169397.pdfIn PDF document text
    • https://s3.amazonaws.com/tokit/xiwavedid.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e144.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE144 5372 bytes
SHA-256: 09a55185300b58a434a736792f76296a6be4e64e2b6fee08ec147e076f571c5a
font_01_sfnt_off0000f374.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF374 11068 bytes
SHA-256: e9726c541c8d87cbf6f2c63d2372ee21ff5c8c78e03785176a4cda4f89755d41

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