Malicious PDF — malware analysis report

Static analysis result for SHA-256 36986e37f8af9d1a…

MALICIOUS

PDF

77.7 KB Created: 2021-01-27 15:07:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: b626aafc8a5a3f5b444a29a9d9128381 SHA-1: b858a0176efe8acd58b86b1adb45d4a516634b6f SHA-256: 36986e37f8af9d1a8cd0fd262a43f70a2b3a4336aa72350770d78a9e361da90f
184 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, traffmen.ru, which is likely intended to phish or deliver malware. The document body, though heavily obfuscated, contains text related to Visual Studio controls, suggesting a lure. The presence of numerous embedded URLs, many hosted on disposable domains, further supports a malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffmen.ru/wb?keyword=add%20custom%20control%20to%20toolbox%20visual%20studio In PDF document text
    • https://cdn.sqhk.co/tinolefowi/Ghc5qhj/video_editor_starmaker_magic_effects_magovideo.pdfIn PDF document text
    • https://cdn.sqhk.co/kafevinuva/iTliciF/business_games_pc_online_play.pdfIn PDF document text
    • http://ceiling48.ru/nekeletupevika79fy.pdfIn PDF document text
    • https://cdn.sqhk.co/mibuxedufexi/cMnzjas/lojupofivakisewalivixofud.pdfIn PDF document text
    • http://hookup153.fun/gekelc06r0.pdfIn PDF document text
    • http://berkeciftci.net/tiradm2r05.pdfIn PDF document text
    • https://cdn.sqhk.co/roxigeve/b7higfA/davisuno.pdfIn PDF document text
    • https://cdn.sqhk.co/kewusikata/hgiNqlh/80180771120.pdfIn PDF document text
    • http://nimened.66ghz.com/vokimikod.pdfIn PDF document text
    • http://prognoz-football.club/kimeliwozazin73sz.pdfIn PDF document text
    • https://cdn.sqhk.co/jolodovi/eJTvhaM/luigi_s_mansion_3_gem_guide_4f.pdfIn PDF document text
    • https://cdn.sqhk.co/zadorari/hazgfjf/cataclysm_dark_days_ahead_mouse_controls.pdfIn PDF document text
    • https://cdn.sqhk.co/wifopuzuxiba/hm9hdHS/fukiboronavik.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fiwabafedazuv.epizy.com/understandable_statistics_11th_edition_answer_key.pdfIn PDF document text
    • http://jariluwalube.epizy.com/beamforming_definition_in_wireless_communication.pdfIn PDF document text
    • https://s3.amazonaws.com/gasodamuza/bukogebe.pdfIn PDF document text
    • http://sofidusujewa.epizy.com/zufifozebozonew.pdfIn PDF document text
    • https://s3.amazonaws.com/toliwudalamem/cayenne_2019_user_manual.pdfIn PDF document text
    • http://lawupoxag.epizy.com/free_autocad_dwg_files.pdfIn PDF document text
    • http://pababevo.epizy.com/62025205163.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_off0000e495.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE495 5344 bytes
SHA-256: 170fa5271fb4b0df7497ae032e1107dbc4112a531eff1010bdd99b9ea7c71d37
font_01_sfnt_off0000f6aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6AA 15572 bytes
SHA-256: f1b3e9a1bd669a2100f26b2040806062fe56096c580d2d5a958d78d71ac16df4

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