Malicious PDF — malware analysis report

Static analysis result for SHA-256 d15d22d87d9b656a…

MALICIOUS

PDF

74.9 KB Created: 2021-03-23 15:58:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5aa28dabc09b5597454d9774d00c0be2 SHA-1: 84455927f11d7264d738f8e049781d643ed0133c SHA-256: d15d22d87d9b656a9312b1c19b52c0f3c3454a3afcd959b0431347e1ced5bdf1
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URI pointing to a suspicious domain, likely intended to host a malicious payload. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. The document body, though heavily obfuscated, appears to be a lure related to a chainsaw repair manual, suggesting a phishing or social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jacksth.ru/wix?keyword=earthwise+chainsaw+repair+manual
    • http://dsv-trening.ru/minn_kota_riptide_powerdrive_v2_i_pilot_upgrade_kit02pab.pdf
    • http://begetus11ppz.xyz/crossfire_captivated_by_yous4mg5.pdf
    • http://help-feedback-amzn8.xyz/how_to_convert_graco_lauren_crib_to_toddler_bedrveon.pdf
    • http://domastmsk.space/how_to_get_car_on_google_mapsu9nbu.pdf
    • http://gebuhrenfrei-mein.com/kovesipibewetubu5gp35.pdf
    • http://kostlike.site/56628445413alpv1.pdf
    • http://uablog.website/fiwipopusiraxibufafudavodmntt8.pdf
    • http://pixxel.life/8956351157982iuq.pdf
    • http://shoppermarket.online/titavuij4qi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://d64d5b41-a66a-4b78-b87f-0feaf8e9cf76.filesusr.com/ugd/cf1aed_c44ab4956a51412a800bea0b2d67a5af.pdf?index=true
    • https://uploads.strikinglycdn.com/files/86b028e8-0156-4638-901b-c828fa017b55/how_to_program_new_directv_remote_to_box.pdf
    • https://151dec52-cf20-477b-a401-a68195eead79.filesusr.com/ugd/8538f4_99a49bc40c3040e4bf89bbdf7039b739.pdf?index=true
    • https://ba428ff1-d53d-4eb5-bdb2-cc960067f420.filesusr.com/ugd/7041e4_10850400774240a8bf3eff3de4fad141.pdf?index=true
    • https://b0b89e74-75d6-43b0-bb8f-fa2cd9bd5f5b.filesusr.com/ugd/b5ae3e_5e2f2e29829b4f93ad96b2ef3d18aef2.pdf?index=true
    • https://uploads.strikinglycdn.com/files/8401fde2-f1b2-4d89-94f0-8c7921d3174a/easy_2_chord_guitar_songs_for_beginners.pdf
    • https://uploads.strikinglycdn.com/files/5e9c7a63-4d40-4097-b0a0-c8e80ab5fa89/warhammer_blood_angels_codex.pdf
    • https://8a833fea-7c9a-4d2e-a5a7-d3590f42a3e5.filesusr.com/ugd/9aab09_0d26ad4120c048a4bd049be44a9dc1fc.pdf?index=true
    • 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_off0000e7da.bin
01d9498b386a89c2c98392d70aaf3cd9a43ee4b51a30cea7da773ea20e3c0e66
pdf-font-stream PDF embedded font (sfnt) at offset 0xE7DA 5220 bytes
font_01_sfnt_off0000f988.bin
593ef0bd3559588d8322fe9c3885c1d08dfe7a8ff64cbf5340809731454d4910
pdf-font-stream PDF embedded font (sfnt) at offset 0xF988 10880 bytes