Malicious PDF — malware analysis report

Static analysis result for SHA-256 011b88aa8bc77453…

MALICIOUS

PDF

68.9 KB Created: 2021-02-21 18:45:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 60ce9ac962491a9b27318e793bb2883a SHA-1: ddc251d6190065048f746e44a583add8e34ef651 SHA-256: 011b88aa8bc77453728fd9755ec266e0ab74a117e875239cbb0d28f012247eda
262 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://crophysi.ru/wix?keyword=google+drive+folder+symbols In PDF document text
    • http://devlp.design/diagramas_uml_ejemplosyd1xk.pdfIn PDF document text
    • http://zoneeuro.pro/norton_anthology_of_english_literature_10th_edition_volume_d_e_fdaolh.pdfIn PDF document text
    • https://dananiruw.weebly.com/uploads/1/3/2/7/132741593/tijofozeluxo-sorile-rikakumu-kivurejowewibiw.pdfIn PDF document text
    • https://suzixibaru.weebly.com/uploads/1/3/4/7/134709676/kedifoxatoz.pdfIn PDF document text
    • http://copyright-securityx.com/60178529576nij3g.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/fojaxexino/livewaveforupa.pdfIn PDF document text
    • http://jeronegiwok.rf.gd/mewefe.pdfIn PDF document text
    • http://kugilib.rf.gd/bogevusabidinilofome.pdfIn PDF document text
    • https://s3.amazonaws.com/sajatofubote/lawiwuwifukugiwalolemebis.pdfIn PDF document text
    • https://s3.amazonaws.com/vukusa/lubufavibil.pdfIn PDF document text
    • https://s3.amazonaws.com/nijudow/call_flow_diagram_visio_template.pdfIn PDF document text
    • http://jorujemefaf.rf.gd/telavisamowikejafuz.pdfIn PDF document text
    • https://s3.amazonaws.com/rekawexuretowo/answer_me_the_band_s_visit_chords.pdfIn PDF document text
    • http://nasukenapab.epizy.com/mifegekelud.pdfIn PDF document text
    • https://s3.amazonaws.com/bipepezuwed/gloud_games_play_store.pdfIn PDF document text
    • https://s3.amazonaws.com/viwoxuz/cholesterol_guidelines_for_type_2_diabetes.pdfIn PDF document text
    • https://s3.amazonaws.com/safenalavojuwu/kjv_bible_uptodown.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_off0000d30b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD30B 5352 bytes
SHA-256: df450e8f46527b3150c1d7717c034687f13ce5f060e5b9180498082b7c6bcdf9
font_01_sfnt_off0000e540.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE540 9880 bytes
SHA-256: 081a2bb02d784f252e86d9c6b90dac8c0c292f902d7ec08bb9aee224c57c8aca