Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bdcc3b78859d770…

MALICIOUS

PDF

77.5 KB Created: 2021-04-14 00:31:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 895bab94dbce4f9f30c47ccc76053d85 SHA-1: d21ba295c323c5a83e74b2428e84f7ffdff69234 SHA-256: 0bdcc3b78859d7705f314f5a1c8f28ae938f9d830fa07ac7455597ba6b5b2dd5
96 Risk Score

Malware Insights

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

The PDF document contains a lure related to recliner repair, directing users to a suspicious URL. ClamAV and ML classifiers identified this PDF as malicious, specifically a phishing trojan. While no scripts were directly extracted, the presence of embedded URLs and the document's deceptive content strongly suggest it's part of a phishing campaign, likely using a spearphishing attachment vector to deliver a malicious payload or redirect to a phishing site.

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://seumenha.ru/strik?utm_term=how+to+replace+recliner+mechanism+spring
    • http://tryplafond.xyz/magnum_x7_airless_paint_sprayer_reviews4qtsv.pdf
    • http://segwaywheelchair.ru/partes_del_cuerpo_en_ingles4ldlp.pdf
    • https://cdn.sqhk.co/nuzitomizaj/geYI8gh/ben_10_up_to_speed_apkpure.pdf
    • http://zumepaposakuf.scienceontheweb.net/barron_s_regents_algebra_1.pdf
    • http://qupieasy.online/74798025753v58m3.pdf
    • http://indir-kazan.com/4528838248896pvq.pdf
    • http://about-central.com/75313527200lulb7.pdf
    • https://cdn.sqhk.co/rorifugera/jjgsveR/kidaforazekurenupovuje.pdf
    • https://cdn.sqhk.co/koporikog/hbGNSxj/bafadaw.pdf
    • https://cdn.sqhk.co/gejixoneku/Bhfidgc/58499379287.pdf
    • http://podifodosej.scienceontheweb.net/carranza_clinical_periodontology_11th_edition_download.pdf
    • https://cdn.sqhk.co/sebixodof/3iajc9P/77683133098.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/pusixa/24856290135.pdf
    • https://s3.amazonaws.com/fekife/bass_guitar_tab_template_word.pdf
    • https://uploads.strikinglycdn.com/files/b62599b6-5a6c-4edd-b43a-34cf8108b25c/spring_framework_web_maven.pdf
    • https://uploads.strikinglycdn.com/files/f942e646-694c-4d1a-a110-326efe7060c6/serato_dj_intro_1.1.2_free_download.pdf
    • https://uploads.strikinglycdn.com/files/3d269099-bc67-4238-8f50-910a9be77135/how_to_set_xfinity_xr2_remote_to_tv.pdf
    • https://uploads.strikinglycdn.com/files/38b37fd7-8fd0-4c9a-a8fa-282da285200c/husqvarna_455_rancher_reviews.pdf
    • https://uploads.strikinglycdn.com/files/3a721d45-c043-4088-871e-7ee505f5408c/88523486450.pdf
    • https://s3.amazonaws.com/xuzed/52759366867.pdf
    • https://s3.amazonaws.com/remavuj/9129514925.pdf
    • https://uploads.strikinglycdn.com/files/90b062dc-49fe-49ea-be5a-4891e67d2ebd/2166042011.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_off0000efa6.bin
6a0f65474a9414cb2fd79c70dfdfc5aca39309a15efb509f35fcfec35e65ba91		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEFA6 5400 bytes
font_01_sfnt_off000101e8.bin
bcb08d8c44006dc179be05b0ed28d125f90774eea03adfa5c7d8eb77c5f0faa7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x101E8 11404 bytes

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