Malicious PDF — malware analysis report

Static analysis result for SHA-256 edc6750ef882b1d6…

MALICIOUS

PDF

72.3 KB Created: 2021-03-12 05:33:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3b7b65734af98c0f6be1f8a78f2065e2 SHA-1: 48fd7b87d66fec465701f675f448ea66e4721430 SHA-256: edc6750ef882b1d6fff06236d0631a476c8585a6eb8b248752590afb6436dc20
96 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of an external URI pointing to 'maypoin.ru' suggests a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a social engineering lure designed to redirect users to a potentially harmful site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://maypoin.ru/award?keyword=iumi+anticoncepcional+bula+pdf
    • http://mestorating.ru/photomath_plus_free_download_iosfdo6z.pdf
    • http://dizodiruliwujoj.22web.org/upfront_magazine_answer_key_november_23_2020.pdf
    • https://cdn.sqhk.co/desixurate/M8yjfhj/sewukod.pdf
    • http://gewututikame.getenjoyment.net/dujesazuvagetozemadatama.pdf
    • http://hightrade.club/8733855957628fqd.pdf
    • https://cdn.sqhk.co/rivinodati/Phh5jd1/bawuz.pdf
    • http://medyahanem.com/errorless_biology_201888r2o.pdf
    • https://cdn.sqhk.co/livixugakuf/I0jjgdV/lutujezupafutedewije.pdf
    • http://bugosegu.scienceontheweb.net/kundalini_yoga_book.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/pavujiniz/causing_death_by_driving_guidelines.pdf
    • https://uploads.strikinglycdn.com/files/5af70f56-8bfd-42e4-bd54-217d63918904/hp_laserjet_pro_400_m401n_print_configuration_page.pdf
    • https://s3.amazonaws.com/davawina/g1_drivers_test_questions_and_answers.pdf
    • https://s3.amazonaws.com/bopuxosavubare/872711906.pdf
    • https://uploads.strikinglycdn.com/files/c1a7cb76-1ddd-4157-930b-35bed2fb6eb4/trig_functions_derivatives_calculator.pdf
    • http://sikitoda.rf.gd/best_stock_android_phones_under_30000.pdf
    • https://uploads.strikinglycdn.com/files/9a037c6b-b442-4ebf-b976-90cb251675a5/how_to_make_easy_paper_airplanes_that_go_far.pdf
    • https://s3.amazonaws.com/dazawojob/10029538792.pdf
    • https://s3.amazonaws.com/pegozegi/23752043383.pdf
    • https://uploads.strikinglycdn.com/files/5f5a2530-0330-42c0-8b53-8ff74a593271/shadowrun_6th_world.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e0ef.bin
7004bb6e57cb9d27fcfd0882bbe87f8eb187791ad4471d8841b52e1d315534f1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE0EF 5104 bytes
font_01_sfnt_off0000f236.bin
2df81c987eab52487e4f4b992e4ad4be7d5fdd12d6734352c86b2a134372e776
pdf-font-stream PDF embedded font (sfnt) at offset 0xF236 9972 bytes