Malicious PDF — malware analysis report

Static analysis result for SHA-256 f928b96dcbc7165a…

MALICIOUS

PDF

90.3 KB Created: 2021-03-22 08:04:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: a7e5ea56c1f389b1262663dbf1aecfe6 SHA-1: 690108d5b327c314e8e987f2727de2d72facce13 SHA-256: f928b96dcbc7165abcb41a23471ffe7ca64c89c35be2d3d74d6c25b18c2b9175
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a ClamAV detection name indicating it's a phishing trojan. The PDF contains an embedded URI pointing to 'soxebez.ru', which is likely the malicious destination. Although no scripts were extracted, the presence of an external URI in a document flagged as a phishing trojan strongly suggests a phishing or malware delivery attempt.

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://soxebez.ru/award?keyword=bilanzen+richtig+lesen+pdf PDF link annotation
    • http://gowanenutik.mypressonline.com/dark_alliance_baldurs_gate_3.pdfIn PDF document text
    • http://vozivovog.scienceontheweb.net/ecotourism_definition.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476782/normal_5fdb368870df9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473654/normal_604e4f98a7798.pdfIn PDF document text
    • http://lebizifijafaxim.medianewsonline.com/vocabulary_words_in_urdu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480878/normal_5febc2f82b83f.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/01f9fd96-5600-4f97-84ed-f4f55047dbba/how_to_reset_my_singer_sewing_machine.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30301493-a725-4ae0-ac88-3a28f3b70951/72688455797.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ade593b6-bf17-485a-9f81-88dcff316b58/how_much_do_occupational_therapists_make_in_nz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c186e617-b805-4561-9bf8-86ae9d692807/5_choices_to_extraordinary_productivity_amazon.pdfIn PDF document text
    • https://s3.amazonaws.com/fulosobezur/anheuser-_busch_inbev_annual_report_2017.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e15897ac-071c-4a2e-a381-f7eba40d3890/gesegufexelanaga.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8fed2da8-4cab-4f4f-be83-b85a67b90b3d/bobekurisevetewuwibuxul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2b229f1-4a87-4139-9d8e-2ba70b55b274/13047660060.pdfIn PDF document text
    • https://s3.amazonaws.com/fojaxexino/nixusomevoralijutelule.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de0eae87-e085-4051-8aa9-80700c53ddc1/takesutavisowejixasixo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d80cad9-ca56-4c62-9dbb-2cc4fed945b2/the_48_laws_of_power_vk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f05621a3-265c-4f30-99d4-0ae425fc35d3/jesumuwebusabowe.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxutedi/dodge_ram_1500_off_road_bumpers.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010312.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10312 5516 bytes
SHA-256: 032ca718223935d6c90a9fec041e83f6abcf8f94e96253eb36d3531bf483c0d2
font_01_sfnt_off000115cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115CF 1800 bytes
SHA-256: daad3f347a4f42f432ee9983e619a7c063e36761dba5934b469418034847e28e
font_02_sfnt_off00011e5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E5D 11856 bytes
SHA-256: bfdbf8aa97fc7cb475b85c73e8bac49a74f66f335f5083e6712ea523cd878955
font_03_sfnt_off0001457c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1457C 16312 bytes
SHA-256: aad9bc0f36eadc3314e08670b59090120051e308b357201f134af3d0b781b2b0

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