Malicious PDF — malware analysis report

Static analysis result for SHA-256 53d2604ee66c1d2b…

MALICIOUS

PDF

81.2 KB Created: 2021-03-19 08:51:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: e75277c4f52d159aaaa7d49be12f501d SHA-1: 9c0df6735efe714199a0c0e2e9a704d22196a495 SHA-256: 53d2604ee66c1d2b5824255e0f2d8d20b517a67948c68f456f8916ceab7072c0
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a PDF SEO link farm. One of these links, 'https://botokaw.ru/award?keyword=largest+economies+in+the+world+2020+pdf', is presented as a direct external URI. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution through these linked PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://botokaw.ru/award?keyword=largest+economies+in+the+world+2020+pdf PDF link annotation
    • http://jujovobima.getenjoyment.net/logaf.pdfIn PDF document text
    • http://vawadofofasip.getenjoyment.net/bwv_1062.pdfIn PDF document text
    • http://nonoxutiwi.mypressonline.com/fifth_grade_math_workbook.pdfIn PDF document text
    • http://suporefebakibur.mygamesonline.org/printable_coordinate_plane.pdfIn PDF document text
    • http://kifopelidito.mypressonline.com/hp_elitebook_8560w_mobile_workstation_user_manual.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/mejobu/butterfly_new_song.pdfIn PDF document text
    • https://s3.amazonaws.com/wamatasamegu/52825913436.pdfIn PDF document text
    • https://s3.amazonaws.com/sirilagewuga/86703903420.pdfIn PDF document text
    • https://s3.amazonaws.com/fupanabivote/arputha_theevu_tamil_movie_isaimini.pdfIn PDF document text
    • https://a24bc4ef-4ee2-4fae-af0c-c9fea810b245.filesusr.com/ugd/67d96c_e945379c015c4940bd46200548991032.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/muxozuvalubi/63335743198.pdfIn PDF document text
    • http://wovodijulenape.onlinewebshop.net/moponor.pdfIn PDF document text
    • https://aabf49e0-5477-4fd2-8456-a986ef8f2a87.filesusr.com/ugd/9e14ca_793aa6e42375495cb06ac84b8d1bd6de.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a64db4e2-2689-469a-9b62-2193e4be2f9b/reglas_de_acentuacion_de_palabras_graves_agudas_esdrujulas_y_sobreesdrujulas.pdfIn PDF document text
    • https://22e365c6-0853-42e1-82f8-83473bf9c0bf.filesusr.com/ugd/217d68_07724b3397d64b0f80272ded43984825.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9ddee03-d13c-4d7b-b5a8-b1d02d6ae357/mifesolejujubulizewitaf.pdfIn PDF document text
    • https://s3.amazonaws.com/tixeligufokup/best_games_ever_for_android.pdfIn PDF document text
    • https://fb4bdcd3-28a3-4206-a6c3-fb267f511c23.filesusr.com/ugd/0ad562_93a36e2ed1534a738020899c738edb62.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vebisop/why_is_the_role_of_the_committee_chair_so_powerful.pdfIn PDF document text
    • http://farovosodiwes.atwebpages.com/acoustic_waves_devices_imaging_and_analog_signal_processing.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_off000100bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100BD 5876 bytes
SHA-256: 7568cb1baea62fcd61cdceb1f17e2602fa677c287d467a4fc0ce65e6c33a8673
font_01_sfnt_off000114a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114A8 10284 bytes
SHA-256: e4b4b9a279260761c992a77646f5a79d2e3e8403dd0ed7412eabc426e560abfa

Open this report in the interactive analyzer, or submit your own file for analysis.