Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fca1f803e2b5874…

MALICIOUS

PDF

76.4 KB Created: 2021-03-09 13:10:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 93a96933a6d14d9fcebd52a8c200cf78 SHA-1: e3785bd9a8da738f4929e434e51256db8a8a22c7 SHA-256: 0fca1f803e2b58742d6f235f5e73b5f099e0e948f6264bceee746d39aab11537
126 Risk Score

Malware Insights

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

The PDF document contains embedded URLs and a heuristic firing indicating it is a link farm designed to redirect users. The primary URL, 'https://fokemale.ru/strik?utm_term=how+to+activate+acrobat+pro+dc+offline', suggests a phishing attempt related to software activation. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution.

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://fokemale.ru/strik?utm_term=how+to+activate+acrobat+pro+dc+offline PDF link annotation
    • https://sotugenedoximo.weebly.com/uploads/1/3/4/0/134040923/bf551aad043b.pdfIn PDF document text
    • http://pinerapidsrr.com/394208902773mu2.pdfIn PDF document text
    • http://gloslides.com/the_forgotten_ways_alan_hirschnyvhl.pdfIn PDF document text
    • http://f13x.xyz/the_oedipus_plays_of_sophocles_paul_roche_audiobookx1jy3.pdfIn PDF document text
    • http://kobasobapina.22web.org/zasotelaverotakisadad.pdfIn PDF document text
    • https://kudokazapa.weebly.com/uploads/1/3/1/4/131452939/mokalodemibivebunug.pdfIn PDF document text
    • http://xegizelodirirok.iblogger.org/what_role_does_the_sun_play_in_atmosphere.pdfIn PDF document text
    • http://reduslim-italiaufficiale.site/byron_katie_worksheet_questionsuhlqw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kidajovude.epizy.com/how_does_the_stock_market_works_for_dummies.pdfIn PDF document text
    • https://s3.amazonaws.com/kugelilizibuwum/present_tense_worksheets_for_grade_5.pdfIn PDF document text
    • http://lipisalozolujew.epizy.com/nexifugisofasevofimezuxa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef61f823-71e0-42a2-9256-5a269e5e4bb5/98638884814.pdfIn PDF document text
    • http://webewogugesuwus.rf.gd/37183627263.pdfIn PDF document text
    • http://jolatuziguxobe.rf.gd/persona_5_yusuke_social_link_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70d83b13-4860-4b8b-b933-3e59838dd5ac/24944444255.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a1729d4-2c6f-4822-a99a-f0f6f40909ac/what_were_the_elements_of_the_reconstruction_plan_of_1867.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5dfdc605-3e6a-4c89-9f4c-25ad521b9549/heroes_of_horror.pdfIn PDF document text
    • https://s3.amazonaws.com/besafefaf/2846405603.pdfIn PDF document text
    • http://darafefe.rf.gd/fulifun.pdfIn PDF document text
    • http://bodotekufuw.rf.gd/if_function_in_ms_excel.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_off0000eb8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB8C 5224 bytes
SHA-256: bb71dc036afc735fa8ffa5b42bc2372a73c3789ecd5c4ee357efd24834b1b08f
font_01_sfnt_off0000fd6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD6E 11892 bytes
SHA-256: d669769c68ee090c8ef0f6066103ee0d7646098250f5896627130057aa4fbec8

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