Malicious PDF — malware analysis report

Static analysis result for SHA-256 dedef0f12a9549eb…

MALICIOUS

PDF

95.4 KB Created: 2021-03-24 03:31:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 1b0f908167a53d94e79b927d65d23449 SHA-1: 736899b43717ebec0a62914bd4a5c1454ecb5969 SHA-256: dedef0f12a9549ebf629cd0db16e41403e92c19bdd371b1c2290eb845153e8b4
96 Risk Score

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, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'https://zajinet.ru/award?keyword=calendario+serie+b+2020+18+pdf', which is likely a phishing lure. No scripts were extracted, but the PDF structure and embedded URI suggest a phishing attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • 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
  • 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://zajinet.ru/award?keyword=calendario+serie+b+2020+18+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4446790/normal_6014cb015d6e5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485696/normal_6012b85291bd5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411700/normal_600133361760c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449181/normal_5fe790019343a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453333/normal_601691c52d011.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/a55b09b8-aed7-49b2-83a7-54a6c25da2e6/how_do_you_charge_a_polaroid_is048.pdfIn PDF document text
    • https://s3.amazonaws.com/votawawo/40975018105.pdfIn PDF document text
    • https://s3.amazonaws.com/jeromisixinolib/73528620270.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c9292a1-e59c-40c9-87c4-73472c9e2396/how_to_critique_a_jazz_concert_report.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/804a4124-11c7-4e0a-a787-1b6f92d610bd/zepevugowafomataxaluzar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da4861f0-64bf-45b4-82c1-738df16a55b3/math_word_problems_keywords_chart.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a47f90e9-4747-4b61-9926-1ab657b4dc33/ammo_reloading_bench_for_sale.pdfIn PDF document text
    • https://s3.amazonaws.com/tadevewuju/sevivitakuxofumul.pdfIn PDF document text
    • https://s3.amazonaws.com/labitajaxatufib/black_and_decker_hand_vacuum_chv1410l32.pdfIn PDF document text
    • https://s3.amazonaws.com/sixenogafopoj/compound_microscope_lab_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5aeabbf-e68f-463f-9679-b15b7975a51d/how_do_you_reset_the_time_on_a_shark_watch.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f242b4cd-2303-4829-a0b3-019ec1972b18/63271230248.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c28025c8-dbba-4c9f-a9fc-4ac3b19b3ed2/how_to_program_roku_remote_to_element_tv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ba0f647-a148-4a81-af7c-7532a010dbb0/dijukowepajosozedamoj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a14dc58-e6b0-4a98-8cde-dafe972c0cc2/2020_ktm_50_owners_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e94cd6a-4095-4e3e-89b4-67b2faf08099/waters_of_babylon_song_meaning.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011d30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D30 5600 bytes
SHA-256: 91d43a838fcaa0e168b8af4a9f77c649e12c2040bb1b4d7bb83883b9502aa101
font_01_sfnt_off0001303d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1303D 13136 bytes
SHA-256: 93a67ff4038ef256f1572c5d2762a2e9cb40805e797fab458ad532428edcc6e1
font_02_sfnt_off000159bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x159BC 16064 bytes
SHA-256: e9cf687b76f137aec67d68831f9d11b8b042d8608c48378d8b0ece48f167d107

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