Malicious PDF — malware analysis report

Static analysis result for SHA-256 947d67c7dc5d2b12…

MALICIOUS

PDF

71.5 KB Created: 2021-03-27 16:51:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 651c916a381dcc0d7436b4dda43e2cea SHA-1: d834b7a9d01d100adcf464920a06f7fed41bf215 SHA-256: 947d67c7dc5d2b127503274987ff774479b659c37ac0df57bcd9081cf3eb7074
96 Risk Score

Malware Insights

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

The PDF document contains an embedded URI that redirects to a suspicious domain, likely for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the presence of external URIs and the overall detection suggest the document is designed to exploit users by presenting itself as legitimate information, likely leading to a malicious download or credential harvesting.

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://nipisod.ru/123?utm_term=brother+dcp-+t310+scanner
    • http://mumijivamivaxij.medianewsonline.com/mijumifokipanejozufiwokix.pdf
    • https://cdn-cms.f-static.net/uploads/4482190/normal_5fd82923e07cd.pdf
    • https://static.s123-cdn-static.com/uploads/4423145/normal_5ff08a1feda55.pdf
    • http://fulukegoror.getenjoyment.net/99406027153.pdf
    • https://static.s123-cdn-static.com/uploads/4368950/normal_6000d4b46a528.pdf
    • https://cdn-cms.f-static.net/uploads/4465396/normal_602b84ff4c9ee.pdf
    • https://cdn-cms.f-static.net/uploads/4368496/normal_6031c529ba227.pdf
    • http://rufawefojag.sportsontheweb.net/bivizawav.pdf
    • http://zonerokemub.getenjoyment.net/2826245624.pdf
    • http://rumigiwataj.getenjoyment.net/anatomy_for_3d_artists_the_essential_guide_for_cg_professionals_ebook.pdf
    • http://pirunumilusarib.sportsontheweb.net/array_of_pointers_in_c.pdf
    • https://cdn-cms.f-static.net/uploads/4504554/normal_6022558bb8ff7.pdf
    • https://cdn-cms.f-static.net/uploads/4415334/normal_6033531b9a586.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://rizaraj.rf.gd/blank_calendar_july_2020_printable.pdf
    • http://bogutofiwib.rf.gd/pollination_worksheet_grade_7.pdf
    • http://bepolujogox.atwebpages.com/tipolapulejamib.pdf
    • http://vimitafukufes.rf.gd/dna_function_and_replication_worksheet_answers.pdf
    • http://faminosokaru.epizy.com/62741802405.pdf
    • http://dagajevefud.epizy.com/26260620682.pdf
    • http://zovagesilamijuj.epizy.com/paxatuvanalixol.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_off0000d8b3.bin
bceca9418d68f96319d11ebd7dd088e196d89039f599ea19b05eb085044d93a8
pdf-font-stream PDF embedded font (sfnt) at offset 0xD8B3 5568 bytes
font_01_sfnt_off0000eba0.bin
b25da1e5649cb651856c553ac01339bdb73fcd4faa0d28f77dab0760e99192a4
pdf-font-stream PDF embedded font (sfnt) at offset 0xEBA0 10924 bytes