Malicious PDF — malware analysis report

Static analysis result for SHA-256 87041dcc9d680a37…

MALICIOUS

PDF

87.1 KB Created: 2021-03-20 00:08:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 7fea2ea593afd077c8588f0afeaff469 SHA-1: 5e939da01573cde08ceef04d4ba59a9f79c2d8d8 SHA-256: 87041dcc9d680a370c6a5f91eab1059adf4118be8153f69204c05840980a9a96
96 Risk Score

Malware Insights

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

The 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 a suspicious domain, suggesting it's used to redirect users to a phishing or scam page. The document body, though heavily obfuscated, contains text that appears to be a lure related to 'Anatomia musculos del cuello pdf'. No scripts were extracted, but the presence of external URIs and the nature of the detection suggest a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://bologen.ru/award?keyword=anatomia+musculos+del+cuello+pdf PDF link annotation
    • http://tifusanesewo.22web.org/update_play_store_app.pdfIn PDF document text
    • http://lajulufubugo.22web.org/baydardi_serial_title_song.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457876/normal_5fcebea790827.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408180/normal_6016021ae365a.pdfIn PDF document text
    • http://sizuxubotinukor.22web.org/kibana_aggregation_format.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4528780/normal_601a204295db3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379035/normal_601e3b0a60148.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416331/normal_5fc75663292e4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447640/normal_6010cd0139acf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467950/normal_5fcb798a12115.pdfIn PDF document text
    • http://zaximudetebase.iblogger.org/the_breadwinner_movie_analysis.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489409/normal_600822e3ee61d.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/laradusa/convert_cdr_files_to_free_online.pdfIn PDF document text
    • http://fapizof.rf.gd/rekenizorukugikerafe.pdfIn PDF document text
    • http://fufibilola.epizy.com/gambar_bunga_mawar_ungu.pdfIn PDF document text
    • https://s3.amazonaws.com/vuxalirudidel/angularjs_template_inject_html.pdfIn PDF document text
    • https://s3.amazonaws.com/faluzotixupi/sides_edges_faces_and_vertices_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/tedowafomaru/82897431404.pdfIn PDF document text
    • http://gipomafusabakix.rf.gd/vinexaxavewipim.pdfIn PDF document text
    • https://s3.amazonaws.com/vutame/30921302200.pdfIn PDF document text
    • http://davakemig.epizy.com/80857614144.pdfIn PDF document text
    • http://wipedeposadav.rf.gd/multiple_arcade_machine_emulator_android.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_off0000f1b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1B2 5076 bytes
SHA-256: 69a260a768a1b0546224003b9a454736b1ede25d6516daa3f518e235eae7949b
font_01_sfnt_off000102de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102DE 11852 bytes
SHA-256: 5dc8b1d7283975c6a0b597bd462ee6682a53d113e2b16ee9027b03e1d9775e97
font_02_sfnt_off000129a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129A4 16204 bytes
SHA-256: e93acd332f5893643511f4cefd38969ad5c744ad1b08842a788b6be7d277dd15
font_03_sfnt_off00013ed2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13ED2 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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