Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d855142394d7b94…

MALICIOUS

PDF

78.9 KB Created: 2021-03-23 10:40:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f9339c8bc3cd7c361696149168d5d16d SHA-1: d5934b751956520f8cc6233c9972b55e6e68a78c SHA-256: 2d855142394d7b94d22c07484314f66724e92485ce10942895cf9e18df4cde8b
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to a suspicious domain, likely intended to host a phishing or malware payload. The document body, though heavily obfuscated, suggests a lure related to programming manuals.

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
  • 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://seumenha.ru/wix?keyword=arduino+nano+programming+manual
    • http://zuraribofib.22web.org/mavumegazonunugu.pdf
    • http://posuvukapimufes.iblogger.org/kexeborofakawabiwaxuz.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/4740a7f1-a6bc-4f2b-a101-52c33a3b58a0/dalotejukevenoxanugim.pdf
    • http://diverozisutujew.epizy.com/ccd_addenda_record_format.pdf
    • http://baxuset.rf.gd/wufonaxive.pdf
    • https://uploads.strikinglycdn.com/files/4e84d2b1-8560-415e-8607-c8b52ee2963f/texas_instruments_ti-34_multiview_handleiding.pdf
    • https://uploads.strikinglycdn.com/files/597fffa4-1fa3-41dc-851a-c53ffdc1ac07/which_black_and_decker_workmate_do_i_have.pdf
    • http://majojevonomofu.rf.gd/beta_distribution_examples_and_solutions.pdf
    • https://s3.amazonaws.com/tuzamada/begoluluwaxusesuwubix.pdf
    • https://s3.amazonaws.com/lusabifef/sevefililukejor.pdf
    • https://s3.amazonaws.com/rovuweraja/how_to_clean_toastmaster_belgian_waffle_maker.pdf
    • https://uploads.strikinglycdn.com/files/8cfbc69d-88a4-451d-a1b1-0fc62a57ac9e/mamomebimok.pdf
    • https://uploads.strikinglycdn.com/files/3f087064-87e4-4991-b3ba-d4da9ee70661/sharp_aquos_quattron_70_inch_price.pdf
    • https://s3.amazonaws.com/wazagidonux/autocad_plan_drawing.pdf
    • http://zisajevejeniw.epizy.com/naxof.pdf
    • https://s3.amazonaws.com/divelatoxa/do_wifi_extenders_work_with_fios.pdf
    • https://uploads.strikinglycdn.com/files/587eb2be-6323-42f7-b5fe-da94a1348192/rimanojisapifanid.pdf
    • https://s3.amazonaws.com/gulapore/285714030.pdf
    • https://uploads.strikinglycdn.com/files/b53d7c82-4cfa-4b5b-9e86-1835a7aa5b87/46550562452.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_off0000f86e.bin
066bfbd8274d49a324ca918eba8893c0f0de4da08433245cc4ff0a9099753e9a
pdf-font-stream PDF embedded font (sfnt) at offset 0xF86E 5088 bytes
font_01_sfnt_off000109a9.bin
c949e6696aa3d3bfe84bffa8826ddb9a465a554757e855db59137db5d41cbca3
pdf-font-stream PDF embedded font (sfnt) at offset 0x109A9 10748 bytes