Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5088ba48e1d7ba0…

MALICIOUS

PDF

79.5 KB Created: 2021-03-08 11:12:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: fa70320ea2e432445bf5635eba95bfeb SHA-1: 8729fa7f7cc0a7bd5343eba2cd6f1064c57eb567 SHA-256: b5088ba48e1d7ba0594d6fdc755e47afea2b12c9c3c9eda883f2cfc49814539b
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with one prominent link pointing to 'midufefew.ru'. The ClamAV detection and ML classifier strongly indicate maliciousness, specifically classifying it as a phishing trojan. The presence of embedded URLs and the heuristic 'PDF_SEO_LINK_FARM' suggest an attempt to redirect users to potentially harmful sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 5

  • 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.
  • 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://midufefew.ru/wix?keyword=the+vaccine+friendly+plan+ebook PDF link annotation
    • http://vumonivaxozutod.mypressonline.com/35948667810.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470412/normal_5fdc6d716e279.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425768/normal_60192d4f40cd7.pdfIn PDF document text
    • http://ledozikatiresev.scienceontheweb.net/78989798632.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366367/normal_5fe989f1978b4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/zasepo/ismart_shankar_dj_songs_mp4.pdfIn PDF document text
    • https://e5720c39-3c1c-4a52-9be9-509675281b5a.filesusr.com/ugd/0010c8_332440eb3cfd4b2ab28047aa35f1f4e4.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tibanepoxilibud/best_classical_music_sites.pdfIn PDF document text
    • https://s3.amazonaws.com/dupula/dawateislami_books_in_urdu_free.pdfIn PDF document text
    • https://s3.amazonaws.com/golepe/bhagwan_ke_bhajan_kare.pdfIn PDF document text
    • https://s3.amazonaws.com/garorowa/gdi_integrated_facility_services_inc._annual_report.pdfIn PDF document text
    • https://s3.amazonaws.com/moduluzuxikari/remogu.pdfIn PDF document text
    • http://fotizojorirepel.onlinewebshop.net/wekoxes.pdfIn PDF document text
    • https://s3.amazonaws.com/dutuzanob/noun_adjective_verb_adverb_test.pdfIn PDF document text
    • https://a1f0096d-76f5-425c-b826-5ccbd312c1bc.filesusr.com/ugd/8f8c07_22a3911815d84c888e7acee6c42f0b9e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/leteraxewe/xagukatipilimulil.pdfIn PDF document text
    • https://da99f664-88c7-4a27-98aa-0bbcec2e8f57.filesusr.com/ugd/66f3f9_95ba7563a0684533864def612a8c1421.pdf?index=trueIn PDF document text
    • https://6e8b94c7-278c-4a65-9c30-8d61c93a8f31.filesusr.com/ugd/9ff9b8_9844a7c287264b1597311ab59c27fbe2.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kovozenamofox/why_look_at_animals_john_berger.pdfIn PDF document text
    • https://ff999131-262c-4f46-aa1e-84c50d3d9e43.filesusr.com/ugd/a474dd_6563c16d3a8e44e0a5cd028fafebd759.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pisik/itep_tax_report.pdfIn PDF document text
    • https://s3.amazonaws.com/zowibatev/96203656785.pdfIn PDF document text
    • https://s3.amazonaws.com/lanaladu/56593377871.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxexi/cribsheet_book_kindle.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_off0000ecb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECB8 5088 bytes
SHA-256: 2c2a6eeacf6e06bd4333aad92a0073396b7964cc87cf2a77692051007ea89e90
font_01_sfnt_off0000fdf2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDF2 10672 bytes
SHA-256: d837bdb45803067c58eab1d5d68f11ec451b567691fd1d04fa2f8b95101a4afa
font_02_sfnt_off00012235.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12235 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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