Malicious PDF — malware analysis report

Static analysis result for SHA-256 03d94957ab798be7…

MALICIOUS

PDF

84.0 KB Created: 2021-03-27 21:44:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d3f6e4bf26c11e415027f7d801e5c366 SHA-1: 6cb5cbbb05ced10e1dedaa8b2d0769acf1ca8a06 SHA-256: 03d94957ab798be708dbc90a7973375653e6e8c68c8dba591dc8baee32abfd06
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, specifically as a phishing trojan. It contains an embedded URL that appears to be a lure, disguised as a search result for a book download. While no scripts were explicitly extracted, the PDF structure and embedded URI heuristic suggest an attempt to redirect the user to a malicious site.

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=the+underground+railroad+book+pdf+download
    • http://gazozaxuk.getenjoyment.net/log_and_antilog_table_file_download.pdf
    • http://tibudirowe.mygamesonline.org/pajefubosimuj.pdf
    • http://praktika-ingenieur.com/anti_deep_freeze_v8nn4eo.pdf
    • http://bijepitujutix.sportsontheweb.net/what_does_the_standard_enthalpy_change_mean.pdf
    • http://samo-katim.ru/12130591908mahiq.pdf
    • http://wonnaturila.space/98211076260q7rzn.pdf
    • http://justiciaforjustice.com/joseph_campbells_heros_journey_explainedkmcoj.pdf
    • http://gonaxepafa.iblogger.org/ejemplo_de_contrato_de_confidencialidad.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://famajojub.rf.gd/what_do_red_lanternflies_eat.pdf
    • http://xaxobozebokawa.epizy.com/shakespearean_english.pdf
    • https://s3.amazonaws.com/ladiwuzetawedi/zojelurak.pdf
    • http://sesugemedolaf.rf.gd/agora_2009_full_movie.pdf
    • https://s3.amazonaws.com/gasodamuza/ffxv_omega_weapon_guide.pdf
    • https://uploads.strikinglycdn.com/files/f3efdc14-2cde-4899-a661-1662d121b913/me_before_you_streaming_canada.pdf
    • https://s3.amazonaws.com/fukezavazuj/handwriting_without_tears_letter_e_worksheets.pdf
    • https://s3.amazonaws.com/babetafaperaxov/khaki_short_sleeve_uniform_shirt.pdf
    • http://vimixof.onlinewebshop.net/astrology_prediction_by_date_of_birth_in_hindi.pdf
    • https://uploads.strikinglycdn.com/files/892ca7ef-445e-4a73-8d62-0105ed815882/ur5u-8780l-twm_samsung_soundbar.pdf
    • https://uploads.strikinglycdn.com/files/4076ad8c-a3f0-4536-9079-cb4394743ba0/84504402088.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fde6.bin
61570544da4b946c164be40e457c7c2eb118ce479755233d3192347934ca1e51
pdf-font-stream PDF embedded font (sfnt) at offset 0xFDE6 5368 bytes
font_01_sfnt_off0001102c.bin
dc1ec669737906a04a3d12ffb9fbd34ea16f41c9deb8a4388b8219d0c9efe707
pdf-font-stream PDF embedded font (sfnt) at offset 0x1102C 2664 bytes
font_02_sfnt_off00011b78.bin
f7931870d25f937b210b4b7e3626a90b9b7d3214b208642f179fd02204274e40
pdf-font-stream PDF embedded font (sfnt) at offset 0x11B78 11304 bytes