Malicious PDF — malware analysis report

Static analysis result for SHA-256 5aee463ce3328b24…

MALICIOUS

PDF

79.0 KB Created: 2021-02-27 08:24:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 3479a0f6542fb1a2264dd9ca6b049688 SHA-1: 23486e72f38e761ff9378527323c6b0a49121a68 SHA-256: 5aee463ce3328b24def1c5904257022fcee1545fadafbf71fa2bd58145aac4f8
126 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, specifically as a phishing trojan. It contains numerous external URIs, many hosted on disposable domains or link farms, suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains references to 'wkhtmltopdf' and a date, indicating it was likely generated programmatically to serve as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://gimoguvi.ru/123?utm_term=the+silver+chair+plot+summary PDF link annotation
    • https://mutolumikiwow.weebly.com/uploads/1/3/1/8/131872082/xeramiguzuzep-silepibodir.pdfIn PDF document text
    • https://cdn.sqhk.co/repipedifavi/i0ibgcM/58968940717.pdfIn PDF document text
    • https://dumetokewip.weebly.com/uploads/1/3/4/3/134394823/8415042.pdfIn PDF document text
    • https://tizomejina.weebly.com/uploads/1/3/3/9/133997236/leposamivudopu_pulonajiza_xelebiduvi_pifekuwutamifi.pdfIn PDF document text
    • http://vash-komfort5.ru/tiwevipawaluru9m968.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410727/normal_6014594176120.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428083/normal_602cfbf0aee35.pdfIn PDF document text
    • http://sdorovie-sustavi.xyz/figures_of_speech_worksheet_grade_42uw2l.pdfIn PDF document text
    • https://wotopegajoxife.weebly.com/uploads/1/3/4/0/134042499/9772831d1affe7.pdfIn PDF document text
    • https://cdn.sqhk.co/vemikozoj/EQjdjqS/slots_for_free_fun_no_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387932/normal_603716f93b678.pdfIn PDF document text
    • http://fesabip.iblogger.org/sewonomotalokatajepiretex.pdfIn PDF document text
    • https://cdn.sqhk.co/dinigivo/2hfyifh/minecraft_world_types_caves.pdfIn PDF document text
    • http://bofesota.66ghz.com/bosomu.pdfIn PDF document text
    • http://zinuxuf.22web.org/use_usb_wifi_adapter_on_android_box.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415929/normal_5fef3419e0a98.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fukepez/igcse_biology_znotes.pdfIn PDF document text
    • http://naxokagad.epizy.com/wepenu.pdfIn PDF document text
    • https://s3.amazonaws.com/setigafat/69930882479.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f7ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7EA 5284 bytes
SHA-256: c62033601977c0c1319a1c53ae2775c04166656fd74a785ae1f94b5913a74c58
font_01_sfnt_off000109c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109C6 10992 bytes
SHA-256: 4e7069a3c4fcaacfcd30d563b0db49a5c8268165347d9daf219cae0828bae7f0

Open this report in the interactive analyzer, or submit your own file for analysis.