Malicious PDF — malware analysis report

Static analysis result for SHA-256 263fa66d501ffc17…

MALICIOUS

PDF

74.7 KB Created: 2021-03-21 20:43:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3ad8b974a739f6e0c304ec9b787860ab SHA-1: e6c28e83767002572b9f1bc36be050c7df933aa8 SHA-256: 263fa66d501ffc172b288bd0ab638037aff2ed508ea02e31ba307e94f402b253
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of an external URI pointing to 'kuzutuzo.ru' suggests a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and the nature of the URL indicate a phishing lure disguised as a camera manual.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://kuzutuzo.ru/wix?keyword=ccbetter+camera+manual
    • https://static.s123-cdn-static.com/uploads/4488837/normal_5fed3b6f7968f.pdf
    • http://gaydating.world/5118192429656wab.pdf
    • https://static.s123-cdn-static.com/uploads/4486221/normal_60069f1006553.pdf
    • http://tesocoin.online/hemingway_hills_like_white_elephants_online3ffoq.pdf
    • https://static.s123-cdn-static.com/uploads/4448746/normal_5ffbb9ba820a4.pdf
    • https://cdn-cms.f-static.net/uploads/4453889/normal_60415e54e7dbe.pdf
    • https://cdn-cms.f-static.net/uploads/4448992/normal_6042056339c33.pdf
    • https://cdn-cms.f-static.net/uploads/4416661/normal_601089a602c67.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/4e159fb7-adee-4fa8-b1e1-722c3418be4c/navokexuledumulux.pdf
    • https://s3.amazonaws.com/jevopemosod/hyperion_dan_simmons_series.pdf
    • https://s3.amazonaws.com/wujapu/rmlau_online_registration_form_2019.pdf
    • https://s3.amazonaws.com/dofufiri/solasewuzovezubikebov.pdf
    • https://uploads.strikinglycdn.com/files/142c34d0-d334-4202-8395-4a105c93b06f/gurufutawuguw.pdf
    • https://s3.amazonaws.com/kewakuko/annexure_f_for_passport.pdf
    • https://uploads.strikinglycdn.com/files/0893566f-8efc-4e32-839f-2aab9489d2a4/84744243474.pdf
    • https://s3.amazonaws.com/dowesitobuga/30122805327.pdf
    • https://s3.amazonaws.com/wiremeresegikon/ninelaroxusokumukemetaza.pdf
    • https://s3.amazonaws.com/jidosatikim/sijuris.pdf
    • https://uploads.strikinglycdn.com/files/8f281d10-dea8-452c-99df-6f53cd0347cd/80188094550.pdf
    • https://s3.amazonaws.com/boxujetanonikuv/how_did_the_first_telephone_work_in_1876.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_off0000ea28.bin
fba2cd4fa4f78b5e82cf415cd09d7c34dfee30f2cb7ecdf9a61c8dc5801304b9
pdf-font-stream PDF embedded font (sfnt) at offset 0xEA28 4812 bytes
font_01_sfnt_off0000fa67.bin
45481081b55f066d58e0f2bdb817694c5c49dd1ae1faed8b814122835bc1e6cd
pdf-font-stream PDF embedded font (sfnt) at offset 0xFA67 10376 bytes