Malicious PDF — malware analysis report

Static analysis result for SHA-256 5efda6819fecfa7b…

MALICIOUS

PDF

94.3 KB Created: 2021-02-12 15:37:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 12bda4fd958a38e6d2c14a3d8373f910 SHA-1: 1a0510d24b9a76ea9d848c77f79e541d16f6f097 SHA-256: 5efda6819fecfa7b5fb9544d28fc8539b73054c3ce9fd15acbba4bffff080140
126 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of embedded URLs, many pointing to disposable domains, indicating a link farm designed to redirect users to potentially malicious sites. The presence of external URIs and the ML detection strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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://leonvi.ru/wix?keyword=beagle+husky+mix+size PDF link annotation
    • http://xtrading.buzz/livro_carcereiros9sw25.pdfIn PDF document text
    • https://vavinaxedekofew.weebly.com/uploads/1/3/0/9/130969509/0d11beda34.pdfIn PDF document text
    • http://myfirstsite.xyz/ant._com_video_er_toolbar_anttoolbar._dllwqijb.pdfIn PDF document text
    • http://omshop.space/55623379049swhhb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451023/normal_60161e497b0e5.pdfIn PDF document text
    • https://nolaxefipox.weebly.com/uploads/1/3/4/7/134740184/migexov-xokeparusibe-rikutotex.pdfIn PDF document text
    • https://cdn.sqhk.co/redexisa/oicjJgf/59624387094.pdfIn PDF document text
    • https://cdn.sqhk.co/vobevufubito/CLaXvgd/mars_trine_mars_synastry_tumblr.pdfIn PDF document text
    • https://cdn.sqhk.co/fovulifavu/gjGhijb/20571357261.pdfIn PDF document text
    • http://skidki-day.site/zewezaxovugijiba43u7f.pdfIn PDF document text
    • http://sentytld.online/papa_louie_2_unblocked_gameszad1z.pdfIn PDF document text
    • http://eagleaff.com/28868170320fija8.pdfIn PDF document text
    • https://kisezuxuromo.weebly.com/uploads/1/3/0/7/130776201/5450380.pdfIn PDF document text
    • https://cdn.sqhk.co/pesuxitum/ieghgiB/29107699437.pdfIn PDF document text
    • https://cdn.sqhk.co/vozaxodep/wSj0ha0/twisted_tea_logo_sticker.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466366/normal_5fe7e2421b177.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480149/normal_5fe1a5f33db17.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/somisilegex/56042257008.pdfIn PDF document text
    • https://s3.amazonaws.com/megulu/43327568201.pdfIn PDF document text
    • https://s3.amazonaws.com/dowesitobuga/23873619258.pdfIn PDF document text
    • https://s3.amazonaws.com/fotojipifuzitul/nutrition_information_popcorn_oil_popped.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fd76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD76 5336 bytes
SHA-256: 2c31751364e2f8fef0cf480657c09d25b5f7d2d25a8bd76bc72e59479db7ff0f
font_01_sfnt_off00010f85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F85 8156 bytes
SHA-256: 809475ed0ff5ffdf3b873a968a64602aaa24e0c116d1aa2c473c9628891732df
font_02_sfnt_off00012a39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A39 10184 bytes
SHA-256: a8977c71cb167a129f8e3059c09cd5d83efa6c14fe604479e0a3801b11959f41
font_03_sfnt_off00014d3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D3D 16512 bytes
SHA-256: 20cde93dd26cc844a52735c985ca13aa4b3b3897aa87c998df43ca580712f53d
font_04_sfnt_off0001633f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1633F 1736 bytes
SHA-256: 1648accd5638f26481c437d0e436fdfb03edab78dab75f4e73239278c8cddc19

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