Malicious PDF — malware analysis report

Static analysis result for SHA-256 5820125487da0606…

MALICIOUS

PDF

77.7 KB Created: 2021-03-10 05:59:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: b187e3c09947a5fcf96f2047a67df55a SHA-1: 17a3056ab9bb4a2c7936f2465097d4c77213a475 SHA-256: 5820125487da06066ebd1e140af11c4229b0a1fa7bb1de43373c6de0d3722cdc
134 Risk Score

Malware Insights

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

The PDF contains heuristics indicating it is a link farm and uses an urgency lure, suggesting a phishing attempt. The presence of external URIs and the ML classifier's high confidence score point towards malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing campaign designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://kuzutuzo.ru/123?utm_term=oregon+dmv+accident+report+request PDF link annotation
    • http://trylait.pro/how_to_make_candy_canes_out_of_pool_noodles6g4dm.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367303/normal_600cf0a626e89.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499995/normal_6047373342353.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371523/normal_5ffcd144702c4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369491/normal_603e280e361e6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425491/normal_603f164d7f302.pdfIn PDF document text
    • http://apeech.ru/doluxiginoxilowebifokotzvdm.pdfIn PDF document text
    • http://zupubovogigu.iblogger.org/54215526119.pdfIn PDF document text
    • http://raifaisentgo.online/pre_calculus_grade_11_textbookgmfg7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374359/normal_6015868b27ea9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427501/normal_6031d0509a349.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387933/normal_5ffd5f00ae566.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385880/normal_6040572f2975e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4530910/normal_6000858aa394d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491152/normal_6006b52859974.pdfIn PDF document text
    • http://mimudobaros.22web.org/girl_interrupted_full_movie_summary.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485572/normal_5ff9b966c4ed8.pdfIn PDF document text
    • http://mon-cmb.best/jelugabanurinagalufafe1wzfh.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bemunaxeje.epizy.com/5352872768.pdfIn PDF document text
    • http://zipokuxabatu.rf.gd/the_giver_all_chapters.pdfIn PDF document text
    • https://s3.amazonaws.com/fowonaxul/adeptus_mechanicus_codex_vk.pdfIn PDF document text
    • https://s3.amazonaws.com/vuzotisenixava/dabakizajogixi.pdfIn PDF document text
    • https://s3.amazonaws.com/fajetufekejo/kekileji.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_off0000f129.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF129 5576 bytes
SHA-256: faab06fcb3f5da849955351571d2bdca5dbdfa9c80e22ea15dcc3846478e16a1
font_01_sfnt_off00010403.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10403 10884 bytes
SHA-256: 072444f25d4b6e60cb6f660fee979d266e3cd97de8b030958db668719f76f2ea

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