Malicious PDF — malware analysis report

Static analysis result for SHA-256 008928efc04d5f63…

MALICIOUS

PDF

85.4 KB Created: 2021-03-25 15:31:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 6321f4392788e653c1bfcd93d71a9a46 SHA-1: 291078727bd13e6d794fb49486b1b860ab015fdd SHA-256: 008928efc04d5f63d6e33cd7d6019d9b06f09b55cde66bac1851b762cfe43f97
186 Risk Score

Malware Insights

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

The PDF document was flagged by multiple heuristics as a link farm, containing a large number of external URLs pointing to disposable hosting services. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. The presence of embedded URLs and the nature of the link farm suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://pelibifir.ru/strik?utm_term=la+republica+platon+libro+1 PDF link annotation
    • https://pabafuneb.weebly.com/uploads/1/3/1/6/131607185/a70ea7a0b3eff.pdfIn PDF document text
    • https://pakumage.weebly.com/uploads/1/3/4/8/134890232/kutavakujop.pdfIn PDF document text
    • https://jowesezowu.weebly.com/uploads/1/3/4/3/134366841/7563716.pdfIn PDF document text
    • https://tijoteveduno.weebly.com/uploads/1/3/4/8/134853829/1577500.pdfIn PDF document text
    • https://rabesala.weebly.com/uploads/1/3/5/3/135394244/jifipudaxinoge.pdfIn PDF document text
    • https://vejarava.weebly.com/uploads/1/3/1/0/131070596/fanaxus_tonenekugisem_pifufofe_bebigosud.pdfIn PDF document text
    • http://xofofumireke.mypressonline.com/88690076051.pdfIn PDF document text
    • http://uablog.website/loner_definition_in_historyqvfgo.pdfIn PDF document text
    • http://telozurilesojo.sportsontheweb.net/woxikojav.pdfIn PDF document text
    • http://witaxolexigabi.mywebcommunity.org/nefuzesawalororodub.pdfIn PDF document text
    • http://dajexori.mypressonline.com/amazon_kindle_model_d00901_will_not_turn_on.pdfIn PDF document text
    • http://padlamadla.site/lang_introduction_to_algebraic_geometry2ut9r.pdfIn PDF document text
    • http://tiktokfrance.fun/xadofijujawu5vj5b.pdfIn PDF document text
    • http://zitokujamu.mypressonline.com/welcome_to_100_free_online_to_word_converter.pdfIn PDF document text
    • http://bumasujofoj.getenjoyment.net/77351494184.pdfIn PDF document text
    • http://teguruta.medianewsonline.com/the_economist_july_2020.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jubogaju.atwebpages.com/87351445298.pdfIn PDF document text
    • https://s3.amazonaws.com/nazekisigiduz/nomow.pdfIn PDF document text
    • http://tuxabatadifu.onlinewebshop.net/41202030113.pdfIn PDF document text
    • http://xiniwipilanaju.atwebpages.com/principles_of_chemistry_a_molecular_approach_3rd_edition_free.pdfIn PDF document text
    • https://s3.amazonaws.com/julaxel/74936202690.pdfIn PDF document text
    • https://s3.amazonaws.com/kisimujuk/crowlands_primary_school_romford_ofsted_report.pdfIn PDF document text
    • https://s3.amazonaws.com/tedowafomaru/geduzivakudazige.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_off0001113b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1113B 4880 bytes
SHA-256: fbe2159ef9c4f5f5c9144facd5967be398cee2d794b3eac7404a9701c107ed5a
font_01_sfnt_off000121e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121E3 11264 bytes
SHA-256: a9f5050d265ddd6b62897025a4dd13ebf7ed470cd527b1a48d16241bfca92fbb

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