Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d6f1227e6539d03…

MALICIOUS

PDF

73.4 KB Created: 2021-04-03 05:04:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d3459bb2fa3a1014f59d6581ce6251d1 SHA-1: 1669c6657a6ad1babd6dc238087c115543e918f0 SHA-256: 8d6f1227e6539d033306cd4b29d8015936004346c437917b1ef5de4d5db0b746
96 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL that directs users to a suspicious domain, likely to host a malicious payload or phishing page. The document body, though heavily obfuscated, suggests a lure related to file conversion, aligning with phishing tactics.

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://dafemum.ru/123?utm_term=psd+to+pdf+vector
    • https://cdn.sqhk.co/jututumogu/2heMtH4/67246486474.pdf
    • https://cdn-cms.f-static.net/uploads/4490950/normal_602a3960c3a3e.pdf
    • https://cdn.sqhk.co/jovowosifo/IiJhbak/fuvilinoza.pdf
    • https://cdn.sqhk.co/wuxofepure/hgdhhhf/59502833508.pdf
    • https://cdn-cms.f-static.net/uploads/4481513/normal_60264b9356b7e.pdf
    • https://cdn.sqhk.co/neruxojus/ghi4gix/72509544231.pdf
    • https://cdn.sqhk.co/ponesigis/fsgggfK/49127786421.pdf
    • http://pidagenavuziw.mywebcommunity.org/g_shock_ga-110rg_set_time.pdf
    • http://lojapidabud.mypressonline.com/mapixosapulifozujuj.pdf
    • https://static.s123-cdn-static.com/uploads/4488323/normal_5fec4794b9618.pdf
    • https://cdn.sqhk.co/femogefuv/hiNjcha/67922782412.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/29f581c9-3d29-4f29-b790-b90045e09b10/whirlpool_water_dispenser_not_working_after_filter_change.pdf
    • https://uploads.strikinglycdn.com/files/e925fbc0-1782-4d36-b0c6-11d2df45edcc/75564052574.pdf
    • https://uploads.strikinglycdn.com/files/18119179-684f-46ec-9135-12031e352f11/dell_inspiron_3847_i5-4460_8gb_1tb.pdf
    • https://uploads.strikinglycdn.com/files/ffdfd10a-8ff9-461b-a1ca-c408394651b9/zamopudalo.pdf
    • http://rizivubonulej.atwebpages.com/joseph_schumpeter_capitalismo_socialismo_e_democracia.pdf
    • https://uploads.strikinglycdn.com/files/b9e03fc6-b47e-4b2f-9384-4f3395e84ae0/true_west_play_reviews.pdf
    • https://uploads.strikinglycdn.com/files/7b93f780-19e8-4d3f-9a52-fbac2a08b6ed/66343815047.pdf
    • https://uploads.strikinglycdn.com/files/9a7d7a84-f6e6-4d50-a7f1-5f5f1a509851/fosifisezujew.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_off0000e071.bin
46bd33f4b7e69dbe784c0d0b3c5185439e80bbd954ad48aace1fbf9ff0dd21cc
pdf-font-stream PDF embedded font (sfnt) at offset 0xE071 4968 bytes
font_01_sfnt_off0000f173.bin
78338d2e6c21b512c7cc28b70345e39abfc56766866dc4f666653d564566d993
pdf-font-stream PDF embedded font (sfnt) at offset 0xF173 11564 bytes