Malicious PDF — malware analysis report

Static analysis result for SHA-256 059962f793586754…

MALICIOUS

PDF

78.6 KB Created: 2021-02-02 04:11:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 07a2e93d2d728383fb64ee17c2810c30 SHA-1: bf7a70887b94bad5b5f3d214a232f57465daf455 SHA-256: 059962f793586754bdb8547d510cffec3a3160502ae0a74b3aaf3f2f9e3d0466
126 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains an embedded URI pointing to 'maypoin.ru', which is likely the malicious destination. The document body, though heavily obfuscated, suggests a lure related to 'tangents to circles worksheet answers', aiming to trick users into visiting the external link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://maypoin.ru/123?utm_term=tangents+to+circles+worksheet+answers PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4379229/normal_5fd165dc6691f.pdfIn PDF document text
    • https://baxomowimesadud.weebly.com/uploads/1/3/5/3/135303612/94220ff124.pdfIn PDF document text
    • https://ximuvibimujobu.weebly.com/uploads/1/3/2/6/132695583/suruzilifevulu_furufeba_legowugelon_mesowuz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448548/normal_5ff8a8106b46d.pdfIn PDF document text
    • http://dabiboniner.22web.org/97558797757.pdfIn PDF document text
    • http://badodamibevije.iblogger.org/3d_model_free_website.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368954/normal_5fe02a68e78ef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470017/normal_5fdc5d7b2825e.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/pivetuzadujo/94446192412.pdfIn PDF document text
    • http://numikowemenaso.rf.gd/68298902675.pdfIn PDF document text
    • http://nijorirofebonin.epizy.com/android_9_bluetooth_name_ndern.pdfIn PDF document text
    • http://zevijefe.rf.gd/kowirorog.pdfIn PDF document text
    • https://s3.amazonaws.com/boxalewijim/peneluxawavazizig.pdfIn PDF document text
    • https://s3.amazonaws.com/podawakumepewez/drum_music_sheet_for_samba.pdfIn PDF document text
    • https://s3.amazonaws.com/wixamupelinere/alliant_energy_stock_transfer_form.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_off0000d1c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1C7 4952 bytes
SHA-256: b50722e0ccf19f703ab22ba1b8554a8d604f5387c6cf21da1f3aff6ef6b0de1c
font_01_sfnt_off0000e2a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2A6 11236 bytes
SHA-256: bfb5d03d00c9e69c51ee2e805ef6f51142d66b5f20407a9a4466cb5cae4fac26
font_02_sfnt_off00010920.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10920 16212 bytes
SHA-256: b24118aec935877da1d578867300642274d6d7315cd0d0e3e9e6e50352971e4c
font_03_sfnt_off00011e7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E7A 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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