Malicious PDF — malware analysis report

Static analysis result for SHA-256 85c758cc1d8d5bd9…

MALICIOUS

PDF

77.1 KB Created: 2021-03-28 06:49:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 410cf84979ba338078b0194ff5baa487 SHA-1: b92290465f2cba989371d4f9bdbcf95c21d41800 SHA-256: 85c758cc1d8d5bd90c9ee0ee11294b4200a4ad20328db61939b9897a5cb46772
96 Risk Score

Malware Insights

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

The file is a PDF document identified as malicious by ML classifiers and ClamAV. It contains an embedded URI pointing to 'https://golowaki.ru/wix?keyword=ancient+greek+timeline+worksheet', suggesting a phishing or malware distribution attempt. While no scripts were explicitly extracted, the PDF structure and embedded URLs indicate a likely intent to redirect users to malicious content, potentially for credential harvesting or further payload delivery.

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://golowaki.ru/wix?keyword=ancient+greek+timeline+worksheet
    • http://picsonair.com/pososunavogonotadujajyi4ct.pdf
    • http://kefisel.22web.org/sample_affidavit_letter.pdf
    • http://xigosilefonaboj.iblogger.org/49189488897.pdf
    • http://tozevikuju.66ghz.com/honda_eu1000i_generator_carburetor_cleaning.pdf
    • http://wiregabjuk.fun/reporting_unclaimed_property_in_puerto_ricoh5y8y.pdf
    • http://medazuxa.mywebcommunity.org/xiginagebepivulufisesile.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/a7730f74-7224-43a9-810b-7fe43213553d/how_long_is_until_my_birthday.pdf
    • https://uploads.strikinglycdn.com/files/c52ed080-6406-4278-bab0-b22fb50a8ca5/sony_fs5_camera_specs.pdf
    • https://s3.amazonaws.com/mijumomub/quadrafire_pellet_stove_parts_in_canada.pdf
    • http://jutejuviwolopis.rf.gd/chaos_theory_scholarly_articles.pdf
    • https://s3.amazonaws.com/dazinibonofobi/matt_jewellery_design_templates.pdf
    • https://s3.amazonaws.com/xuvamuba/allok_3gp_converter_free.pdf
    • http://sulegezusaz.epizy.com/analysis_of_quick_sort_algorithm.pdf
    • http://bebojivim.myartsonline.com/put_watermark_on_mac.pdf
    • https://s3.amazonaws.com/zunaporam/rowerereroroderak.pdf
    • https://uploads.strikinglycdn.com/files/5433c51f-480f-4435-9453-f75018136569/sotomakurezaputedavewuga.pdf
    • https://s3.amazonaws.com/woxewiwupir/63769599618.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_off0000f17b.bin
3e0ba8f50a1702f2e9a73e3bcfb1ec0d4055ace0851ffd3bcb7ce4c26e3b0d82
pdf-font-stream PDF embedded font (sfnt) at offset 0xF17B 5148 bytes
font_01_sfnt_off000102eb.bin
e546e99a6313486d4f2253d877346b5c1684a77886b5d9a4678dd98aee12a4cd
pdf-font-stream PDF embedded font (sfnt) at offset 0x102EB 10808 bytes