Malicious PDF — malware analysis report

Static analysis result for SHA-256 63e3ce19c3a2c82a…

MALICIOUS

PDF

81.6 KB Created: 2021-02-27 19:34:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 6a86a75286f588638eaff8e8e2dd2124 SHA-1: 308236b0d3c1b2a66f1c58e44a1d204da5d8557f SHA-256: 63e3ce19c3a2c82a4412c2f38ca36ae65286ba7acf5c335761bb85acd9d0a60d
134 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous embedded URLs, many pointing to disposable hosting or link farms, suggesting an attempt to redirect users to malicious content. The presence of a 'download button' heuristic further supports a lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://xezojetit.ru/strik?utm_term=pci+serial+port+driver+dell+optiplex+755 PDF link annotation
    • https://xomadugazulu.weebly.com/uploads/1/3/4/5/134597447/1735d2.pdfIn PDF document text
    • http://negozio50sconto.info/queen_size_bed_sheet_dimensions_usak6sat.pdfIn PDF document text
    • http://newyearshop.site/pitofozotijimetufonasevek6zz02.pdfIn PDF document text
    • https://cdn.sqhk.co/lakisitu/YQjvdlK/descargar_sea_battle_2_apk_hack.pdfIn PDF document text
    • http://desararixiwikos.22web.org/40293733176.pdfIn PDF document text
    • http://zupibupiju.iblogger.org/carbon_copy_cloner_beta.pdfIn PDF document text
    • https://sewogasi.weebly.com/uploads/1/3/1/1/131163712/dc6252c0730.pdfIn PDF document text
    • https://cdn.sqhk.co/gifalaminika/y3M1jdV/star_wars_jedi_fallen_order_dlc_release_date.pdfIn PDF document text
    • https://cdn.sqhk.co/bipozipo/jhid3ie/microsoft_azure_logo.pdfIn PDF document text
    • https://dovasivenumi.weebly.com/uploads/1/3/5/9/135965427/jikukivigujimuxorij.pdfIn PDF document text
    • http://slamelina.website/universal_themes_in_literaturegm5sv.pdfIn PDF document text
    • https://wididalinur.weebly.com/uploads/1/3/3/9/133986726/f8f6809.pdfIn PDF document text
    • http://barbanapoli.moscow/35172088705eqy2t.pdfIn PDF document text
    • http://shop50off.info/pijaseleworakametebutokfktz.pdfIn PDF document text
    • https://filavemegu.weebly.com/uploads/1/3/4/8/134883773/bumemowug.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://tivijovu.epizy.com/vance_packard_the_hidden_persuaders_summary.pdfIn PDF document text
    • https://s3.amazonaws.com/zikeko/kunipimonatajoviw.pdfIn PDF document text
    • http://sofapeferusoxud.epizy.com/tokyo_ghoul_season_3_episode_list.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f3a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3A3 5084 bytes
SHA-256: 05f18cc798e22d1ec58cf899d85c239ce561af52b60ad9705c219d4ffc0f21a4
font_01_sfnt_off00010506.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10506 11004 bytes
SHA-256: 370e9ccd54442c678897b1d46f222869fafb7898ae11dbc4d15e1a6fa8f6311e
font_02_sfnt_off00012a96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A96 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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