Malicious PDF — malware analysis report

Static analysis result for SHA-256 f870d244008a4a53…

MALICIOUS

PDF

79.2 KB Created: 2021-05-24 21:40:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 773c043cde1739d8286f0c9f148ddeb7 SHA-1: 54f517f2aea6699d9085a1b82882e5e0e5cd2c34 SHA-256: f870d244008a4a5386f69ad362556e4a80c3a20bf29eec0ef52ee571fcf4449d
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to a suspicious domain, which is likely used to host a phishing page or download a secondary payload. The presence of PDF-specific heuristics further supports its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/strik?utm_term=star+wars+the+rise+of+skywalker+disney+plus+release+date+uk
    • https://cdn-cms.f-static.net/uploads/4368466/normal_606d1083c6857.pdf
    • https://cdn-cms.f-static.net/uploads/4459166/normal_60240ff7ddaad.pdf
    • https://cdn-cms.f-static.net/uploads/4384167/normal_60103c0d9686b.pdf
    • https://cdn-cms.f-static.net/uploads/4403127/normal_602e38b45caa8.pdf
    • https://cdn-cms.f-static.net/uploads/4379476/normal_60138ddab326c.pdf
    • https://cdn-cms.f-static.net/uploads/4459784/normal_6022d9ff65e96.pdf
    • https://static.s123-cdn-static.com/uploads/4459477/normal_5ff070cfdab63.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/sesafefanulokam/xisikigagijolepuwozoguja.pdf
    • https://uploads.strikinglycdn.com/files/9fa3dee6-f8c8-4ecf-be56-228823a10855/excelsior_college_nursing_lpn_to_rn.pdf
    • https://uploads.strikinglycdn.com/files/b8486f5a-96fa-42ad-92ff-de91a28f4ef9/sasujemeruvowuwi.pdf
    • https://s3.amazonaws.com/defipedibe/ferojuwotuzazuzevagazuju.pdf
    • https://s3.amazonaws.com/vufupu/free_mind_map_template_excel.pdf
    • https://s3.amazonaws.com/wavunot/90464276795.pdf
    • https://s3.amazonaws.com/jevedijadiki/sat_sample_papers_download.pdf
    • https://s3.amazonaws.com/mubemutolewe/al_quran_with_urdu_translation.pdf
    • https://s3.amazonaws.com/salade/allok_video_converter_full_crack.pdf
    • https://s3.amazonaws.com/sabegokek/pentair_easy_touch_remote_manual.pdf
    • https://s3.amazonaws.com/teximikamukubo/windows_shortcut_key_dual_display.pdf
    • https://s3.amazonaws.com/sefiwegegagu/94999130836.pdf
    • https://uploads.strikinglycdn.com/files/c95c664a-f11e-4f10-b357-c25a8e8144c3/mr_sandman_tab.pdf
    • https://uploads.strikinglycdn.com/files/67b2e214-799e-44b4-98af-430861701843/what_are_the_different_types_of_preschool_curriculum.pdf
    • https://s3.amazonaws.com/vipinib/abokado_menu.pdf
    • https://s3.amazonaws.com/sojuravewi/atlanta_georgia_tourism_guide.pdf
    • https://uploads.strikinglycdn.com/files/aa68fb11-9191-4851-b81f-4cf6d8b28567/nanasiduseverukixeli.pdf
    • https://s3.amazonaws.com/xetasif/clinical_pharmacology_and_therapeutics_free.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_off0000f708.bin
d3c10614cefc2108d282a9ca87a25afab0183abd1119cc259416490d0fd9ed25		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF708 5488 bytes
font_01_sfnt_off000109c6.bin
61517bc4bf860889cbe6e731233fe6708a2c25791eab915b39f80667c1f99e51		 pdf-font-stream PDF embedded font (sfnt) at offset 0x109C6 10876 bytes

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