Malicious PDF — malware analysis report

Static analysis result for SHA-256 067ac21e7c199aab…

MALICIOUS

PDF

87.8 KB Created: 2021-03-17 06:55:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 12c85ab2d36c1eac8e9ac5636e6b4b04 SHA-1: 0e3a812b79f741d0be0a8e072c03827af8dd87e6 SHA-256: 067ac21e7c199aab927b224b27cc530b6848fd4c81e5138f3a2f780d0625bf80
184 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a critical heuristic identifying a link to known malicious redirector infrastructure. The document appears to be a link farm designed to funnel users towards potentially malicious sites, masquerading as software download resources. No scripts were extracted, but the presence of malicious links and the ML classifier's high confidence score indicate a phishing or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://dafemum.ru/123?utm_term=audacity+vocal+remover+software In PDF document text
    • https://static.s123-cdn-static.com/uploads/4468286/normal_5fee109934d00.pdfIn PDF document text
    • https://cdn.sqhk.co/kekotenonaxu/jighgjg/4042184539.pdfIn PDF document text
    • http://proita.space/nicomachean_ethics_book_10_chapter_7o2f17.pdfIn PDF document text
    • http://alisabor.design/aluminum_die_casting_alloys2vsbc.pdfIn PDF document text
    • https://cdn.sqhk.co/bujiwamovul/cggFYhg/color_wheel_chart_for_makeup.pdfIn PDF document text
    • https://cdn.sqhk.co/dunafafaxen/fXgeyhh/dokufozuliwemagegimejepis.pdfIn PDF document text
    • https://cdn.sqhk.co/lakodatoli/gsjhlhc/gojisazujarugeg.pdfIn PDF document text
    • http://myluckywin.site/what_song_plays_at_the_end_of_titanic0i6np.pdfIn PDF document text
    • https://cdn.sqhk.co/vuxevabuvix/Rifighb/real_carrom_3d_multiplayer_game_mod.pdfIn PDF document text
    • http://lofitner.buzz/how_do_i_reset_my_samsung_refrigerator_after_power_failuren21is.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408481/normal_600894575e938.pdfIn PDF document text
    • https://cdn.sqhk.co/badiboxa/aHjcB9p/potuloberunuketagenogole.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485457/normal_5ffa691441904.pdfIn PDF document text
    • https://cdn.sqhk.co/dodirorip/rYggzhg/97410922882.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/vukujidor/vugiwobamosirakibep.pdfIn PDF document text
    • https://54570836-76ea-4100-b78f-d1ba4c3cc0d1.filesusr.com/ugd/21ac59_b8cf4218c99a4729873eeffbaa6e4c0e.pdf?index=trueIn PDF document text
    • https://62abf401-5fc9-4991-ac00-cb6a0c8cf8ec.filesusr.com/ugd/e4ff69_65ad77f9c25b45449ab05f9e02ec76a0.pdf?index=trueIn PDF document text
    • https://af431a04-9ebc-4ea4-a98d-45e4ffbfad14.filesusr.com/ugd/485053_39fe50e28dfe4c6f9376b78d25208cbc.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/juliziwojatige/dreamboxedit_3._0.pdfIn PDF document text
    • https://104e0e48-a4c2-4a03-8647-06ef64d4e6ac.filesusr.com/ugd/e2c6c1_cef6aef24cae45ee8d03076846f476a4.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jixeremipet/netgear_r6200v2_specs.pdfIn PDF document text
    • https://70fbc5f3-53e4-4072-9ff7-a5862d19847b.filesusr.com/ugd/bb3bf9_10545b9e2a4f414697a8d20fcfebdad2.pdf?index=trueIn 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_off00010b89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B89 5184 bytes
SHA-256: dabd8ef16adf00229aabccc99c312ee5a9f351001573c5189a6a08d3506b3b8e
font_01_sfnt_off00011d43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D43 11200 bytes
SHA-256: 9b119c9370b117ab96780f30d7e03df10215b6e60b6591bd34ccea651035f949
font_02_sfnt_off00014399.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14399 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e