Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5c63e42441bcbdd…

MALICIOUS

PDF

81.8 KB Created: 2021-01-21 02:41:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 403daad033406028e71c4a61ee07d406 SHA-1: 27712667cf69e5dd181385d2e37b3a95dc04df4c SHA-256: e5c63e42441bcbdd4031442554fc7272f6d595ea39676c0fda4a19444988b11c
126 Risk Score

Malware Insights

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

The PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable domains or link farms, suggesting an attempt to redirect users to malicious sites. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a deliberate effort to create a link farm for SEO manipulation or to host phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffine.ru/aws?utm_term=administrative+assistant+functional+resume+template PDF link annotation
    • https://site-1235182.mozfiles.com/files/1235182/49605893280.pdfIn PDF document text
    • https://pokasejazutiz.weebly.com/uploads/1/3/4/4/134447431/kavamukewajumeg_jaxogof.pdfIn PDF document text
    • http://golulim.iblogger.org/49022359555.pdfIn PDF document text
    • https://site-1176116.mozfiles.com/files/1176116/jaloguxodogasawununox.pdfIn PDF document text
    • https://site-1188796.mozfiles.com/files/1188796/globe_at_home_username_and_password_huawei.pdfIn PDF document text
    • https://cdn.sqhk.co/gotakavapu/8jHFhmW/60605964932.pdfIn PDF document text
    • https://site-1166680.mozfiles.com/files/1166680/most_anticipated_android_games_2020.pdfIn PDF document text
    • https://site-1168410.mozfiles.com/files/1168410/algebra_questions_and_answers_year_6.pdfIn PDF document text
    • https://mixozanuzobese.weebly.com/uploads/1/3/5/4/135400893/95aec9.pdfIn PDF document text
    • https://cdn.sqhk.co/gesafafo/iaiieC5/baleful_sentence_making.pdfIn PDF document text
    • https://webexozaputer.weebly.com/uploads/1/3/2/6/132681415/bd8a5ed808a3fe2.pdfIn PDF document text
    • https://site-1176633.mozfiles.com/files/1176633/bakery_business_plan_template_free.pdfIn PDF document text
    • https://cdn.sqhk.co/rajunakeb/E3hdgj9/xevafigelejevumev.pdfIn PDF document text
    • https://gupufema.weebly.com/uploads/1/3/4/4/134456882/af9b47.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
    • http://mefinuxewo.epizy.com/81317302719.pdfIn PDF document text
    • https://s3.amazonaws.com/runuzitexokol/thng_t_07_2016_tt-_bltbxh.pdfIn PDF document text
    • http://dibezul.epizy.com/21915774671.pdfIn PDF document text
    • https://s3.amazonaws.com/sizabo/update_dependencies_in_android_studio.pdfIn PDF document text
    • http://matunojusorim.epizy.com/b-_form-_group_horizontal_label.pdfIn PDF document text
    • http://fetufebutegiv.rf.gd/90643418491.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_off0000f483.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF483 5232 bytes
SHA-256: b6ae40b36da57e7762d627b1f7bf3eb48acd858de34a903b757ed16fc3993cbf
font_01_sfnt_off00010630.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10630 11092 bytes
SHA-256: fb03afc42c5137e567b87d20ebd0fe250f5475ecac6111d290736599dcf5cd04
font_02_sfnt_off00012b2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B2B 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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