Malicious PDF — malware analysis report

Static analysis result for SHA-256 18c1e53983443dcf…

MALICIOUS

PDF

73.3 KB Created: 2021-03-27 12:04:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 16643ae74627838a0376e210dc13ef43 SHA-1: 8a871532bc579ae3bd4599bdddaefc74dbd369e3 SHA-256: 18c1e53983443dcf3f3173479be4572d3b4a7a97e3dbc82a4a25fb9457dd8a28
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URI pointing to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The document body, though heavily obfuscated, suggests a lure related to 'associating PDF files online'. The presence of an external URI strongly indicates an attempt to redirect the user to a malicious site for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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://xezojetit.ru/award?keyword=associer+fichiers+pdf+en+ligne
    • https://xaruxetadelu.weebly.com/uploads/1/3/4/4/134478950/4e6eced.pdf
    • https://memetunariva.weebly.com/uploads/1/3/1/4/131454345/59e831.pdf
    • http://ingmijn.com/wozigok5i7p5.pdf
    • http://proba7.xyz/zobawanudizozofa4z1mw.pdf
    • http://livecopyrightverification.com/how_many_calories_do_you_eat_in_a_yeara206u.pdf
    • http://mihetos.xyz/mukuvorjzfmy.pdf
    • https://pagejenaxupiwig.weebly.com/uploads/1/3/4/3/134383440/6d7bb44778d5f.pdf
    • http://tesugujinarijag.mywebcommunity.org/vatikibekuto.pdf
    • http://vowujebotoza.mywebcommunity.org/77327983568.pdf
    • http://sebevifa.getenjoyment.net/tekisiziko.pdf
    • http://useraisins.pro/g_star_raw_jeans_size_guide8xbqv.pdf
    • http://jobs-ingenieur.best/j_ai_envie_de_coucher_avec_mon_filsxgssv.pdf
    • https://fojevuresuzuj.weebly.com/uploads/1/3/4/8/134881640/4967740.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://sanagubilisefuw.rf.gd/addition_and_subtraction_of_radicals_worksheets.pdf
    • http://jikusona.rf.gd/interstitium_organ_scientific_reports.pdf
    • https://uploads.strikinglycdn.com/files/963df98b-44cf-4bf6-8402-2f549d3e40bd/oreck_xl_vacuum_bags_ccpk8dw.pdf
    • http://nusilemil.epizy.com/davinci_kalani_4-in-1_convertible_mini_crib_grey.pdf
    • http://bibuzijuta.epizy.com/united_carry_on_bag_size_2019.pdf
    • https://uploads.strikinglycdn.com/files/e4ca6550-d7e7-43fd-aedf-dc9a32b7d67c/pameroka.pdf
    • http://gikunipif.epizy.com/girl_guides_uniform_trinidad.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_off0000df52.bin
897a45e7eb11cdf7bef2eec324f74732d671737229a39ead820ab3677bec2d84
pdf-font-stream PDF embedded font (sfnt) at offset 0xDF52 5196 bytes
font_01_sfnt_off0000f102.bin
32665897cd6cac65e3948a2336d120b7b6c1f40f2fd79e2060d981c3bfff7d58
pdf-font-stream PDF embedded font (sfnt) at offset 0xF102 11572 bytes