Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a19d01a51db0f3e…

MALICIOUS

PDF

93.2 KB Created: 2021-03-05 05:15:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: 332a059562650aafe823cc6ccd8f6d68 SHA-1: 93e66c4bee71745e3e0a1434a80e8468654294ed SHA-256: 0a19d01a51db0f3e9edf3f6e8891acf2213cec9b1bd1bf75c6e062d0eae96767
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The heuristics indicate the presence of a link farm with numerous external PDF links, suggesting an attempt to distribute further malicious content or engage in SEO manipulation for malicious purposes. The document also contains a visual download button lure, reinforcing the deceptive nature of the file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://leonvi.ru/123?utm_term=english+idioms+pdf+download PDF link annotation
    • https://cdn.sqhk.co/feguzuvubut/fXWCk5F/infection_symptoms_skin.pdfIn PDF document text
    • http://nageramuvepom.mywebcommunity.org/libro_cien_aos_de_soledad_de_que_trata.pdfIn PDF document text
    • https://cdn.sqhk.co/nurijodefa/Ijdl7ij/tiny_archers_hack_apk_download.pdfIn PDF document text
    • http://bikejesoxatelo.mygamesonline.org/1678970385.pdfIn PDF document text
    • https://cdn.sqhk.co/kulabokirow/jcvgdjg/1412095934.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kakasis.onlinewebshop.net/fegase.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44c104b6-db94-497f-b6c5-b3ff0e9f2fb4/why_is_my_samsung_fridge_ice_maker_not_working.pdfIn PDF document text
    • http://guwaxilajoxeza.onlinewebshop.net/4317816314.pdfIn PDF document text
    • https://s3.amazonaws.com/xeropizuwe/pizugigowisorudexigi.pdfIn PDF document text
    • https://s3.amazonaws.com/sirilagewuga/emulator_android_apkpure.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1eb886c5-a30b-49de-97e5-884d2c5def15/will_there_be_anymore_percy_jackson_books.pdfIn PDF document text
    • https://ffcd7f67-9b43-45c2-8e44-b15cca9583b8.filesusr.com/ugd/48bf55_360bddbe1587430a83f7c7063c6a3d1a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/ziwuvijevo/7124594914.pdfIn PDF document text
    • https://5d3a3edc-1384-4eb0-a354-174dd54c13aa.filesusr.com/ugd/7f5dc5_126979e5279d4855b592459b0904a284.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f96aa54-b5f9-4fd3-821a-dd0b920d7d95/fopixi.pdfIn PDF document text
    • https://s3.amazonaws.com/dazuxujepov/anari_1959_full_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/bezegoluzose/azoospermie_secretoire.pdfIn PDF document text
    • https://s3.amazonaws.com/zoxewudunigus/71737359396.pdfIn PDF document text
    • https://s3.amazonaws.com/rilexazejuzovep/anaconda_movie_free_in_telugu.pdfIn PDF document text
    • https://76ed6b59-b034-43ac-b949-e1c08f76e3cb.filesusr.com/ugd/ee6100_85df3587763249bfab81ca82533119f8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/julexekubaj/9985060418.pdfIn PDF document text
    • https://s3.amazonaws.com/pulavokaxe/furniture_design_drawing_software_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c420d376-f054-43e7-8186-063a9ab8fcf2/bodibipuwofenexinebesopet.pdfIn PDF document text
    • https://507d1b22-ea03-4061-a262-f79425337ca2.filesusr.com/ugd/a374b9_c90f069912c649b49a22aacf059beeb4.pdf?index=trueIn PDF document text
    • https://d5fb4b5d-766d-4e54-ab1c-ecc61d2b7d82.filesusr.com/ugd/b0c8dc_a04cb6ea86234667994e3af7b8882323.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c92e68db-3985-49bf-8085-31549a57d944/betegatutafesuzaxavu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011e0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E0E 5408 bytes
SHA-256: a30444d9c73265baaf6080ee37b885fdaec733804fb14182b013617fb19a8001
font_01_sfnt_off0001305f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1305F 4036 bytes
SHA-256: 1a35407575cad6deb51a888317f651538f7264576f188220f470a911c385c90b
font_02_sfnt_off00013fc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FC4 10952 bytes
SHA-256: 8f454863fbc26508a74afb2f8273e1bc7dae2fec4c5b3db81fa073341bcbe0bb