Malicious PDF — malware analysis report

Static analysis result for SHA-256 269992e84f6cc34b…

MALICIOUS

PDF

72.4 KB Created: 2021-04-05 11:42:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: d29aeca2fe9e729e9c9cafc410bdf07e SHA-1: 293b26174db0c1b20558390ba2ea87536d3bd22a SHA-256: 269992e84f6cc34b48e0daf7083bdf4b084a825058dfd7be68d60b397f6e2ed7
96 Risk Score

Malware Insights

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

The file is a PDF containing an embedded URL that points to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The ML classifier also flagged this PDF with high confidence. The document body, though heavily obfuscated, contains text related to 'Orbit and phases of the moon lab answers', suggesting a lure to disguise the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://xajibur.ru/wix?keyword=orbit+and+phases+of+the+moon+lab+answers PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4370068/normal_60061d4fc7b71.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475727/normal_60684365de214.pdfIn PDF document text
    • http://dipugipedanam.sportsontheweb.net/free_to_word_converter_download_softonic.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447460/normal_5fe4f632bb25a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411931/normal_6002dd930da85.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372085/normal_5fdb89b9ea243.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451228/normal_60243dcd6e1cc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449998/normal_5fe035d118587.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383561/normal_604b72cb76a4f.pdfIn PDF document text
    • http://gixodugesu.medianewsonline.com/deh-150mp_pioneer_manual.pdfIn PDF document text
    • http://mobufuwiwid.medianewsonline.com/how_to_clean_print_nozzles_on_hp_printer.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476578/normal_6056e7f01cd14.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xovolefewawex.atwebpages.com/what_is_central_processing_unit_of_computer_and_its_function.pdfIn PDF document text
    • https://s3.amazonaws.com/towutoginadivu/mount_and_blade_warband_1.168_serial_key_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c3f3f68-a50d-489a-8f01-e582b014b790/telephone_triage_protocols_for_nurses_julie_k_briggs.pdfIn PDF document text
    • https://s3.amazonaws.com/bezutu/bye_bye_by_rjz_song.pdfIn PDF document text
    • https://s3.amazonaws.com/mejados/fugisejezilurozewovun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f84adb74-0d16-47e3-9dda-7589ee7bfe54/focusrite_18i20_3rd_gen.pdfIn PDF document text
    • https://s3.amazonaws.com/megelugik/46984794556.pdfIn PDF document text
    • https://s3.amazonaws.com/vebisop/distributive_law_algebra_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/daniwodug/cake_mania_app.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE5B 5540 bytes
SHA-256: 15771bc38e9ac81c2c67aa24b85d0ffbabb4ad178bf52b42627283fc5e80d6a3
font_01_sfnt_off0000f10e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF10E 10336 bytes
SHA-256: 5846fca5f237529295039922f1f4f2d6962c817a54c813987fed94628b555448

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