Malicious PDF — malware analysis report

Static analysis result for SHA-256 8534db127a620cda…

MALICIOUS

PDF

76.1 KB Created: 2021-03-31 03:41:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3fdc5b7083cfe7c78300059bd1b01bf9 SHA-1: d2bae3c75c917b2697fb4a0e97b8d638d3e127f2 SHA-256: 8534db127a620cda9be1322e05dfd289cc9a0d92a55c44bd4b414a50c200a41c
96 Risk Score

Malware Insights

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

The PDF contains an embedded URL pointing to a suspicious domain, identified by ClamAV as a phishing trojan. The document body, though heavily obfuscated, contains keywords related to Android phones, suggesting a lure to entice users to click the malicious link. The presence of external URIs and the ML classifier's high confidence score further support the malicious classification.

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://lozipotod.ru/123?utm_term=latest+android+phones+in+pakistan+2018
    • http://e-sparks.ru/96655872210joj61.pdf
    • http://nujerizura.iblogger.org/7401634567.pdf
    • http://desofudexe.22web.org/dota_2_support_guide_7._20.pdf
    • http://kuxupit.22web.org/63021528692.pdf
    • http://mandarins.space/kutimemofubacglec.pdf
    • https://mexupapomumag.weebly.com/uploads/1/3/0/7/130775103/kubugam.pdf
    • http://bilkaita.space/lapurirunex4h4k.pdf
    • https://dimafaxatabevex.weebly.com/uploads/1/3/5/9/135991177/9957a245ecfd.pdf
    • https://seritixatot.weebly.com/uploads/1/3/1/0/131070849/revuno_juvuzofulaw_xuberas_fojip.pdf
    • http://figojusu.iblogger.org/japudumomonasikaxaredas.pdf
    • http://dixojele.22web.org/88276178927.pdf
    • http://myfoxing.online/online_photo_book_printing_indiayovl4.pdf
    • http://megantv.site/momuwejltxs9.pdf
    • http://mir23.xyz/batofijabirimisgm4z.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://pilewizipa.rf.gd/arbys_gyro_salad_nutrition_information.pdf
    • http://suxosimuji.epizy.com/78943463755.pdf
    • http://jaxilikujo.rf.gd/97375046401.pdf
    • https://uploads.strikinglycdn.com/files/972dcb96-a8b0-48be-8ed0-bb0977b6b101/can_hisense_roku_tv_be_mounted.pdf
    • https://uploads.strikinglycdn.com/files/60b393f8-d582-41fc-98a4-faccce5cba89/how_do_you_get_a_bartending_license_in_texas.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_off0000ea7a.bin
696a7dc100b792cb8487acb32be6fde9a2adcd0edb76f7fc84d1ccc6a67a0016
pdf-font-stream PDF embedded font (sfnt) at offset 0xEA7A 5540 bytes
font_01_sfnt_off0000fd4d.bin
1ccc1eca82b764b4e7e117d80a3749d4e64d28132d06cf1a2a5fbf4715f69e92
pdf-font-stream PDF embedded font (sfnt) at offset 0xFD4D 11164 bytes