Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b123ce014072802…

MALICIOUS

PDF

66.8 KB Created: 2021-02-28 17:58:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 7173f2635052c5e07d8253f7e3713d9c SHA-1: 5e7d1f64a1913cb18e71c9905f16c6b74abd5bbf SHA-256: 7b123ce014072802f8cd62b3bd3ba71bea3122ed66417f67078046516acac6bb
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://crophysi.ru/wix?keyword=lewis+dot+structure+activity+2+answers'. This indicates the document is designed to redirect users to a potentially harmful site. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the presence of malicious URLs and the nature of the redirector suggest a phishing or malware distribution attempt.

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/wix?keyword=lewis+dot+structure+activity+2+answers In PDF document text
    • http://wapadax.scienceontheweb.net/true_love_quotes_in_tamil_hd_images.pdfIn PDF document text
    • http://fumexijana.getenjoyment.net/camping_merit_badge_workbook.pdfIn PDF document text
    • http://nipizakevenuvis.scienceontheweb.net/nopakitajono.pdfIn PDF document text
    • https://cdn.sqhk.co/ravuviwidi/djiITlX/grandpa_movie_jackass.pdfIn PDF document text
    • https://cdn.sqhk.co/moturalogupe/Nljeb8X/wood_block_puzzle_game_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/bosesegivu/Dhbhfhf/slime_mixing_new_2020.pdfIn PDF document text
    • http://jusukigib.sportsontheweb.net/old_craftsman_table_saw_motor_repair.pdfIn PDF document text
    • http://nemosixumeki.mypressonline.com/gudujebexabebel.pdfIn PDF document text
    • http://rumurel.mywebcommunity.org/12856123852.pdfIn PDF document text
    • http://remontlegko.info/marvel_runaways_season_3_castnfysr.pdfIn PDF document text
    • http://rasudilikid.mywebcommunity.org/vinegukumasevubekutija.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nojikigor.myartsonline.com/james_patterson_alex_cross_film.pdfIn PDF document text
    • https://s3.amazonaws.com/radubozufiwo/lezufa.pdfIn PDF document text
    • https://s3.amazonaws.com/xutomoxu/ralirugawoxojolikepas.pdfIn PDF document text
    • https://s3.amazonaws.com/pafexegud/bobby_shmurda_android_meme.pdfIn PDF document text
    • https://s3.amazonaws.com/rezugekolaba/best_high_sound_alarm_tone.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_off0000c911.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC911 5228 bytes
SHA-256: 61ab73e881d34e8209febc5b0272949beefde81c006c0cc1773e800137aa6d10
font_01_sfnt_off0000db08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB08 10352 bytes
SHA-256: cbf7f5e41394db0fe5d510ee561830df8681cb78755073da03663be6a8b9bcb0

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