Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7850b0d7bdbea9c…

MALICIOUS

PDF

79.3 KB Created: 2021-04-22 21:08:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 3780237f84a8d6bd17164f6262980d58 SHA-1: 26595c8c070425cb41011697ee0c231e0f073e09 SHA-256: d7850b0d7bdbea9c556877c91bdf742429c5169d6ae892c73a828140028b2e72
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which are part of a link farm hosted on disposable domains, indicating a phishing or scam attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to malicious content or phishing pages. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://seumenha.ru/strik?utm_term=aquarius+harry+potter+crests+slim+1000+piece+jigsaw+puzzle PDF link annotation
    • https://berafakeje.weebly.com/uploads/1/3/4/0/134000448/zawezusilulukemegod.pdfIn PDF document text
    • https://bobiputab.weebly.com/uploads/1/3/2/8/132814039/titox-xefevoromumivon-xapav-galapariwoja.pdfIn PDF document text
    • http://lewukub.22web.org/all_of_me_lyrics_piano.pdfIn PDF document text
    • https://wamogipoko.weebly.com/uploads/1/3/0/7/130739383/wugubanukogawaveko.pdfIn PDF document text
    • http://zexaribamemavi.sportsontheweb.net/agatha_christie_novels_top_10.pdfIn PDF document text
    • http://mojadejazisapa.sportsontheweb.net/50737632259.pdfIn PDF document text
    • http://jekeluxuto.mywebcommunity.org/stephen_king_outsider_imdb.pdfIn PDF document text
    • http://vufexojotakoj.iblogger.org/69050263937.pdfIn PDF document text
    • https://jegetujo.weebly.com/uploads/1/3/5/3/135300600/4957445.pdfIn PDF document text
    • http://mikovil.mywebcommunity.org/gakufuzojitililokimeni.pdfIn PDF document text
    • http://madawuboso.sportsontheweb.net/tipos_de_atos_administrativos.pdfIn PDF document text
    • http://kubosikavudux.mygamesonline.org/steve_jobs_quotes_death_bed.pdfIn PDF document text
    • https://zoxofaduw.weebly.com/uploads/1/3/2/6/132683138/2436669.pdfIn PDF document text
    • http://ketorebagibof.22web.org/8253990848.pdfIn PDF document text
    • http://fipixavonusin.iblogger.org/damozasugo.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://doxefozogad.epizy.com/how_to_do_table_topics.pdfIn PDF document text
    • http://minudiginodege.epizy.com/3064648539.pdfIn PDF document text
    • http://mofuwokive.epizy.com/noserotuwigulonokoregeg.pdfIn PDF document text
    • http://buguwotibiven.rf.gd/katakana_trace_sheet.pdfIn PDF document text
    • http://nukivamo.myartsonline.com/what_does_fl_mean_on_duralast_jump_starter_700.pdfIn PDF document text
    • http://faleferesevo.onlinewebshop.net/bumibunosejose.pdfIn PDF document text
    • http://vejimugar.epizy.com/acknowledgement_of_debt_template.pdfIn PDF document text
    • http://jadefixadejin.rf.gd/78711813065.pdfIn PDF document text
    • http://dajaxul.epizy.com/76789805774.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_off0000e44d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE44D 5752 bytes
SHA-256: 7774682aac0c3274ea31fc42fc7cbec70f5e8821ffc28850ba57686331fd5cc2
font_01_sfnt_off0000f814.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF814 13172 bytes
SHA-256: 80fc323ebd91887a0151834523e4d9ea8304f77a739ec2640b37194bda781db0
font_02_sfnt_off00012110.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12110 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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