Malicious PDF — malware analysis report

Static analysis result for SHA-256 2905943217697f67…

MALICIOUS

PDF

86.3 KB Created: 2021-05-01 16:08:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6399f41e79236109a9292e1ea6e66fc9 SHA-1: a23ada0a17d9c1588659631eb1ec20d8287cd7bf SHA-256: 2905943217697f6764e58ae5dae34ff17e0c4bfc998a470202d6d305d4d6aff1
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains an embedded URL that directs users to a suspicious domain, likely for further exploitation or credential harvesting. No scripts were extracted, but the presence of an external URI and the overall detection suggest a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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/strik?utm_term=c+a+reference+manual+by+harbison+and+steele
    • http://merovew.xyz/96653108352yrjy5.pdf
    • https://cdn.sqhk.co/wosipuvetot/ATkcibT/tant_origami_paper_amazon.pdf
    • http://cosmeteca.com/the_christmas_song_movie_castglyur.pdf
    • https://cdn.sqhk.co/pinofizulag/cnjeYX9/fadixuvuresate.pdf
    • https://cdn.sqhk.co/nodezaneripe/vxheigY/reverso_grammar_german.pdf
    • http://storedubai.shop/93367620210ap9l5.pdf
    • http://karma-911.com/persona_4_last_day_for_social_links8qwyf.pdf
    • http://lessonsonline.site/bafebaxefug8rv2g.pdf
    • http://evgeniy-semenenko.ru/sisenujepiq3t7u.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://xabuduzefaf.epizy.com/catalogo_boticario_ciclo_8.pdf
    • http://xupudajiwozov.epizy.com/printable_basic_pre-_algebra_worksheets.pdf
    • https://e590c0d9-b694-44fb-9862-47327b30d8b0.filesusr.com/ugd/89363e_1ea6a4f0f49643d19f562923851746c5.pdf?index=true
    • https://uploads.strikinglycdn.com/files/e64b498a-d886-4b76-bc5d-012e0f47c61f/62219630213.pdf
    • http://woxogakodilip.epizy.com/english_grammar_book_download.pdf
    • http://nubejapowij.epizy.com/59216255866.pdf
    • https://569961a5-e6b5-462d-8b38-7193d5e7b20b.filesusr.com/ugd/a37a2e_1c153995392d49d28335d94c1fa1ceb5.pdf?index=true
    • http://tezajiduzut.epizy.com/biostar_x370gtn_manual.pdf
    • https://uploads.strikinglycdn.com/files/2828716f-ad4a-470c-9a60-9f0f3d18dddd/53436157128.pdf
    • https://uploads.strikinglycdn.com/files/62ab9f06-2e60-4ec8-9778-0fe535ef1251/denara.pdf
    • https://uploads.strikinglycdn.com/files/f03a25f1-7a13-4ed4-9f2b-e86e51918df1/thule_bike_rack_hitch_removal.pdf
    • https://0491f86b-060d-4f4a-be23-b0d01488777f.filesusr.com/ugd/faa7ef_128ffabdb2104183a15d9e7ea51e9880.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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00012e87.bin
8386abb368e2c2237bb788f754c552422b8f32f864ae12d6feb34dcc197dd452		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x12E87 18260 bytes
font_00_sfnt_off0000f357.bin
8dbabf5bc4e5cdf541ee270d0693bfd88e7d513e1eef7d3e1c38f61598658d95		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF357 5408 bytes
font_01_sfnt_off00010592.bin
51d313280fec171ba924dc0716b7792837c93ad3ff90cdeb34c9acdd17837ab3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10592 12008 bytes

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