Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d1608f0d4b552c3…

MALICIOUS

PDF

73.4 KB Created: 2021-06-09 17:19:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 7e80c75a57b2de17ce8b26ab00e81089 SHA-1: fefbf19df1d4ac4316a4b511abd23e38dbfb26ae SHA-256: 9d1608f0d4b552c3b8855cc245166fcc76d58d2ef3f242885bb7652b06784abf
94 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, and it contains an embedded URI pointing to a suspicious domain. The document body, though heavily obfuscated, suggests a lure related to 'cute printable calendars 2021', which is likely a pretext to drive users to the malicious URL. No scripts were extracted, but the presence of an external URI and the overall detection profile strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9933

Heuristics 3

  • 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
  • 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://smidgel.ru/pbw?utm_term=cute+printable+calendars+2021 PDF link annotation
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9235271-7c3a-4161-8d01-703b0ef65de9/vegopamejajumigad.pdfIn PDF document text
    • http://valotuvo.pbworks.com/f/44841705438.pdfIn PDF document text
    • http://dojejezo.pbworks.com/w/file/fetch/144798216/dna_of_the_gods_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0ba8b79-4626-4d56-8647-33feb27a93b2/dubasamipofi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61a525d1-8088-46e5-aaa5-3069378a99a3/gunoge.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10802e73-2766-401d-a7f6-ee58fb5eb737/12331390934.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12c22f6b-1ead-4b77-a79d-7fbdb5833710/jupevazar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87ad65a8-4c3b-4f5b-b322-75ec1cbf795d/nufexova.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0adb1903-5932-4633-a40e-3e7f5239ef82/64253548384.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db7f45c1-325c-4f1a-9b25-a2da78559ecc/nonlinear_dynamics_and_chaos_strogatz_2nd_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/970fb571-9bef-4f8d-8e67-1e349f56f450/baixar_livro_de_quimica_organica.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e06d3acd-ed5b-47b6-a94d-f7b7cdedd20c/tefiwotadobemanibutorifo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c6295e0-9d77-4334-b9be-f694fe771622/the_language_of_composition_reading_writing_rhetoric.pdfIn PDF document text
    • http://kakexigodelo.pbworks.com/f/34395979441.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/36a9c612-44ff-4e94-9f4b-4c7760dadfec/donald_goines_books_made_into_movies.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38a09e1d-dbf3-4064-ab5d-bfdb53ed53de/necchi_270_sewing_machine_price.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b3080b5-ac44-4e91-9574-6aa69e342cc0/61397909788.pdfIn PDF document text
    • http://fuxotatizexu.pbworks.com/w/file/fetch/144567132/key_components_of_transformational_leader.pdfIn PDF document text
    • http://jajisaparev.pbworks.com/w/file/fetch/144418398/twrp_3.0_2_apk_download.pdfIn PDF document text
    • http://gitizuxob.pbworks.com/w/file/fetch/144921879/present_perfect_progressive_tense_examples_sentences.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/102f0814-d402-43a2-80cc-c645a2bff348/19982763000.pdfIn PDF document text
    • http://kakexigodelo.pbworks.com/w/file/fetch/144683499/vetetetinoxubipodo.pdfIn 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_off0000f35f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF35F 5440 bytes
SHA-256: a4451bb184a7a5f79641aaae2d3824f2670b39535becf60c6c86ba7685c57301
font_01_sfnt_off000105d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105D8 10644 bytes
SHA-256: 1f5bebb93051b3e16e1cdb9f601dcb37be832cb4e787f616bb29210546c310f6

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