Malicious PDF — malware analysis report

Static analysis result for SHA-256 61aefb940fafcd45…

MALICIOUS

PDF

77.8 KB Created: 2021-01-23 05:29:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 8b6ac64983774b4f87ca2dbe99808b84 SHA-1: 93643602f135c74c51c85c0377cc974e4c4f3593 SHA-256: 61aefb940fafcd459153db0d64e14a0bef74f79ae6c1a1cf92444f47706b7124
154 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics, including a critical alert for linking to known malicious redirector infrastructure. The embedded content, though heavily obfuscated, suggests a lure related to 'soccer goalie glove size guide'. The primary malicious IOC is the redirector URL, which likely leads to a phishing or malware download site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • 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://crophysi.ru/aws?utm_term=soccer+goalie+glove+size+guide In PDF document text
    • https://site-1209851.mozfiles.com/files/1209851/89737067220.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481397/normal_5fcc500acc707.pdfIn PDF document text
    • https://site-1179563.mozfiles.com/files/1179563/9_ft_pre_lit_pencil_christmas_tree.pdfIn PDF document text
    • https://site-1177940.mozfiles.com/files/1177940/psychology_fun_facts_tumblr.pdfIn PDF document text
    • https://site-1172122.mozfiles.com/files/1172122/82966814719.pdfIn PDF document text
    • https://site-1255732.mozfiles.com/files/1255732/alaipayuthey_movie_flute_ringtone_free.pdfIn PDF document text
    • https://site-1175422.mozfiles.com/files/1175422/clouds_wallpaper_cartoon.pdfIn PDF document text
    • https://site-1198654.mozfiles.com/files/1198654/66459073115.pdfIn PDF document text
    • https://site-1192422.mozfiles.com/files/1192422/endeavour_energy_electricity_network_performance_report.pdfIn PDF document text
    • https://site-1219632.mozfiles.com/files/1219632/63190768145.pdfIn PDF document text
    • https://site-1174236.mozfiles.com/files/1174236/2003_cadillac_deville_dhs_owners_manual.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://pejinubonuxus.epizy.com/android_online_emulator.pdfIn PDF document text
    • https://s3.amazonaws.com/sulasatevirexo/espresso_test_android_kotlin.pdfIn PDF document text
    • https://s3.amazonaws.com/fumiposamisur/94044271149.pdfIn PDF document text
    • https://s3.amazonaws.com/fasudikek/wisconsin_cosmetology_written_exam_study_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/wizidimawag/dizenozoparekemol.pdfIn PDF document text
    • https://s3.amazonaws.com/zifilobesumafi/daxegedulakuziruxis.pdfIn PDF document text
    • https://s3.amazonaws.com/rolefosiju/tri_fold_brochure_background_design_free.pdfIn PDF document text
    • https://s3.amazonaws.com/wiwamoxamo/badal_movie_songs_hd_1080p.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_off0000e8b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8B2 5016 bytes
SHA-256: d21e2c1b6830e7f04eecfaa3df6a8b059add833edf6c6bfda59f122e0d84bcf5
font_01_sfnt_off0000f9c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9C5 10032 bytes
SHA-256: 3072d10634af3a3e651f2bb27de946dd38e2a1632f384d877aa9f69548788c3d
font_02_sfnt_off00011c2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C2D 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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