Malicious PDF — malware analysis report

Static analysis result for SHA-256 63b225a601c53c00…

MALICIOUS

PDF

80.9 KB Created: 2021-02-15 16:39:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: a86c3386712f6300b56c11838d4d5eb8 SHA-1: 1bbe86a1a92c7262c1adec58a74c05042e1d1919 SHA-256: 63b225a601c53c00dfd4c7d14904dc2c304d662a1a513ffb99bd567119efbfa4
134 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable hosting, and a heuristic specifically flags it as a link farm designed for SEO manipulation. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and URL findings suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://seumenha.ru/123?utm_term=can+i+use+google+translate+offline PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4458827/normal_601f5fa9ac6b9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448980/normal_5fdc1cb76e4f0.pdfIn PDF document text
    • http://zinekob.66ghz.com/adare_ashawari_video_song.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415045/normal_6015eea989877.pdfIn PDF document text
    • http://ruxipivufaditij.22web.org/airline_ticketing_system.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454821/normal_60222939e6a92.pdfIn PDF document text
    • http://zogigokilogipex.22web.org/stay_with_me_goblin_violin_sheet_music.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417408/normal_5ff05b5f2b8e0.pdfIn PDF document text
    • https://cdn.sqhk.co/sesexibanobu/hiioXia/53134772137.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477400/normal_600734a429c71.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418791/normal_5ffe6fa6ef54c.pdfIn PDF document text
    • https://cdn.sqhk.co/tinodifozeza/ghuFQie/flow_free_bridges_sampler_9x9_level_18.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380867/normal_5fc6c8ea720ae.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://pagikojezokatu.rf.gd/81813881077.pdfIn PDF document text
    • http://rarezutawuwelam.epizy.com/vebepu.pdfIn PDF document text
    • http://sisawujeza.rf.gd/37033062118.pdfIn PDF document text
    • http://vijanemafe.rf.gd/google_sheets_iferror_leave_blank.pdfIn PDF document text
    • http://gamutazuzores.epizy.com/aashiqui_2_songs_naa_songs_free.pdfIn PDF document text
    • http://xulivef.rf.gd/geraxadifemo.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_off0000f325.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF325 4840 bytes
SHA-256: f4d70bda7e22f60ab32dca91ae2834fb866fbb7a75749d2b6130a1210c24d69d
font_01_sfnt_off000103ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103AC 10624 bytes
SHA-256: 9ae350dab61c797d4be4b91d5431729f27ec22b23f5a8d3e9b949e96b93dcd76
font_02_sfnt_off000127fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127FC 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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