Malicious PDF — malware analysis report

Static analysis result for SHA-256 28e97614de434662…

MALICIOUS

PDF

77.2 KB Created: 2021-03-28 21:34:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 078319c9bb59dfdd8081d1726e1f2dac SHA-1: 1efb0ec894687d3fc9d4625005914397232d946a SHA-256: 28e97614de43466200d8a7699cd9861690a707d5cf0dba474be4d68948d09986
104 Risk Score

Malware Insights

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

The file was detected as a malicious PDF by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of external URIs and a visual download button suggests a phishing or social engineering attack aimed at tricking the user into downloading further malware. No scripts were extracted, but the PDF structure itself is indicative of a malicious payload delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://pelibifir.ru/award?keyword=abacus+maths+pdf+free+download
    • https://cdn.sqhk.co/wibononuve/jjgidhp/motorcycle_racing_2019_uk.pdf
    • https://cdn.sqhk.co/pubamegumox/cHoxbOu/computer_launcher_apk_pro_download.pdf
    • https://cdn.sqhk.co/wexifidobafo/cMo17jg/44643356645.pdf
    • http://vipadobosu.iblogger.org/nupoxerubezubirujudaf.pdf
    • http://difuraw.22web.org/46912677676.pdf
    • https://devarewiwigunum.weebly.com/uploads/1/3/2/7/132710712/bojetusut_burijavugurike_tenupozikoziro.pdf
    • https://static.s123-cdn-static.com/uploads/4500904/normal_60017cab2bd97.pdf
    • https://cdn.sqhk.co/jakufomego/TxQ3ijH/machinarium_demo_online_free.pdf
    • http://xojosagefe.22web.org/bunukitedizefad.pdf
    • https://satiragekawojiw.weebly.com/uploads/1/3/2/7/132740750/9477185.pdf
    • https://cdn-cms.f-static.net/uploads/4388271/normal_6032645b2e184.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://ramapenutizawa.epizy.com/73662616959.pdf
    • https://s3.amazonaws.com/medaliwifufugel/primed_to_perform_website.pdf
    • http://borinalujid.epizy.com/fazib.pdf
    • https://s3.amazonaws.com/womirofop/48527202390.pdf
    • http://sesoxevanadike.epizy.com/new_world_symphony_dvorak_sheet_music.pdf
    • https://s3.amazonaws.com/jenagubadopi/anker_a7726_keyboard_not_pairing.pdf
    • http://gusozafameximi.epizy.com/apache_flink_for_windows.pdf
    • http://pavinudoj.epizy.com/jexafowimuligolokijuniti.pdf
    • http://borinalujid.epizy.com/bosch_serie_6_washing_machine_manual.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_off0000ed74.bin
d2eba04a434e687c8d9d19136d69463624874206f86e01d0002c353a1ac7615e
pdf-font-stream PDF embedded font (sfnt) at offset 0xED74 5616 bytes
font_01_sfnt_off00010070.bin
afa06cbb457e7b845d13d0e19954a57bbad8978ad35be1b3828aa42dfcdd4653
pdf-font-stream PDF embedded font (sfnt) at offset 0x10070 11052 bytes