Malicious PDF — malware analysis report

Static analysis result for SHA-256 2da852dd9ad8f067…

MALICIOUS

PDF

64.2 KB Created: 2021-02-11 14:47:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: 33237de2596bf7fdd25504f25f74cdbb SHA-1: 44dc6f3f4e102a95b74c51cc2a72aa429af69738 SHA-256: 2da852dd9ad8f0672c3aef85c3a35bb24a7279dc2397164824a3575cba3b8946
146 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 and a link farm heuristic suggests the document is designed to redirect users to potentially harmful websites. The document body, though heavily obfuscated, contains keywords related to 'piano sheet easy', which is likely a lure to disguise the malicious redirection.

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • 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://druttle.ru/aws?utm_term=hallelujah+piano+sheet+easy PDF link annotation
    • http://kosolibanun.iblogger.org/angularjs_adminlte_template.pdfIn PDF document text
    • https://xogepojofaridel.weebly.com/uploads/1/3/2/7/132741214/1134704.pdfIn PDF document text
    • http://surogufepisim.iblogger.org/guided_anti_ship_missile_crossword.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tezofer.rf.gd/b._ed_form_fill_up_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/jutenojamega/watchmen_2009_full_movie_480p.pdfIn PDF document text
    • http://zedafazoteto.epizy.com/repavizavanasezasexut.pdfIn PDF document text
    • http://gadoxijumulop.epizy.com/34859233754.pdfIn PDF document text
    • http://popadugabi.rf.gd/fitted_crib_sheet_set.pdfIn PDF document text
    • http://juwelaloz.epizy.com/2020_census_form_example.pdfIn PDF document text
    • https://s3.amazonaws.com/fikuvine/reporting_depreciation_expense_on_income_statement.pdfIn PDF document text
    • https://s3.amazonaws.com/numegubowalonan/84786367637.pdfIn PDF document text
    • http://jakiwokokik.epizy.com/79836717366.pdfIn PDF document text
    • https://s3.amazonaws.com/pukiza/54409559229.pdfIn PDF document text
    • http://zetikof.epizy.com/19641944530.pdfIn PDF document text
    • https://s3.amazonaws.com/kotodur/bhole_di_baraat_dj_mix_song.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_off0000bdc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBDC4 4948 bytes
SHA-256: bf9aa2ed08621865400952606d42bcd1bcf4634dbaae17bd5648c5353a93c3b0
font_01_sfnt_off0000cea1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEA1 10604 bytes
SHA-256: 998e15ce907e96bb3cec9d32367a44da169e1e31214abcb289e817131c2aa11d

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