Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb033e8b6b985038…

MALICIOUS

PDF

106.1 KB Created: 2021-04-11 00:51:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 887b842e38d45b1c2d0e7bae6842b1bf SHA-1: 605863caf135f3cf5d7262d452141e3491f7ec32 SHA-256: eb033e8b6b985038a1f58dbec10343a00956c7c1b38e20e4d3b79efe4942181a
126 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of external URIs, particularly those on disposable hosting with UTM parameters, suggests a phishing or redirection attempt. The document body, though heavily obfuscated, contains text related to 'cultural imperialism' and application metadata, which likely serves as a lure to disguise the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://botokaw.ru/strik?utm_term=what+is+cultural+imperialism+give+an+example PDF link annotation
    • https://cdn.sqhk.co/kozutani/pWRQxD7/annual_leave_request_form_template_excel.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408176/normal_5feb9d5f86b95.pdfIn PDF document text
    • https://cdn.sqhk.co/vagekoxes/zjfng6G/balejiwetufox.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369905/normal_601e5fe4de4bd.pdfIn PDF document text
    • https://cdn.sqhk.co/simikitivo/gjgO1hj/stick_cricket_premier_league_uptodown.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477155/normal_5ff26fdad0d74.pdfIn PDF document text
    • https://cdn.sqhk.co/janezewufaj/iu1Dcig/five_nights_at_freddy_s_2_unblocked_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403543/normal_60552894d8b7a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413982/normal_602941763f942.pdfIn PDF document text
    • https://cdn.sqhk.co/gepeduvo/i7Ghfjf/walmart_espn_table_tennis_black_friday.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473916/normal_5fcbbe4ed56a3.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/legobegutulo/dallas_cowboys_injury_report_thanksgiving.pdfIn PDF document text
    • https://s3.amazonaws.com/vipuxafol/42404131808.pdfIn PDF document text
    • http://ledolabufimo.epizy.com/cisco_sg350-_20_datasheet.pdfIn PDF document text
    • http://rowitamox.rf.gd/onkyo_tx-nr626_wifi_problem.pdfIn PDF document text
    • http://pebulibupa.rf.gd/solokozujamedepanupodugo.pdfIn PDF document text
    • http://tokavasetalan.epizy.com/maryland_dhcd_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/jobavo/pazifu.pdfIn PDF document text
    • https://s3.amazonaws.com/kovozenamofox/best_dm_shots.pdfIn PDF document text
    • http://poxotoromerolu.rf.gd/brevet_2020_sujet_franais.pdfIn PDF document text
    • http://jagivaxo.rf.gd/62117654294.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_off00015dcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15DCB 5488 bytes
SHA-256: bd6103188c9d0bcd5fe4cd61b85cacdb61b6b115c5c057dbc75fd7d17fb80139
font_01_sfnt_off00017061.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17061 12908 bytes
SHA-256: 97e66543db45008f272445abe56d73bc1a88ec83e01f2be7a90e556d0e123c3b

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