Malicious PDF — malware analysis report

Static analysis result for SHA-256 afc5ce335cae3984…

MALICIOUS

PDF

74.3 KB Created: 2021-04-02 16:49:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 7ec24ccf4015b00c6b669a0a1f9432f4 SHA-1: 4e6308a6e78ea5bfe31eea231c3e2fd24902ac20 SHA-256: afc5ce335cae39847f92a339c8f491415b3f63fcca26a7b92ace164cd23abfd0
134 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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.
  • 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
  • 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://dugedepap.ru/strik?utm_term=halo+warfleet+ebook PDF link annotation
    • https://cdn.sqhk.co/zoburawava/8hgghAt/pencilmation_3_coloring_sheets.pdfIn PDF document text
    • https://cdn.sqhk.co/dujagazatad/iIghhjq/birthday_cake_with_name_and_photo_edit_online.pdfIn PDF document text
    • https://cdn.sqhk.co/woleparos/97cCifV/suseladinexose.pdfIn PDF document text
    • https://vujemojijub.weebly.com/uploads/1/3/3/9/133997462/dinavabasase.pdfIn PDF document text
    • https://lufumapapolag.weebly.com/uploads/1/3/4/3/134353855/bofazilomi.pdfIn PDF document text
    • https://numokupe.weebly.com/uploads/1/3/4/8/134857704/zosokemazokofinim.pdfIn PDF document text
    • https://tufizesux.weebly.com/uploads/1/3/4/5/134596030/2568011.pdfIn PDF document text
    • https://tofejigijo.weebly.com/uploads/1/3/4/3/134312142/9188543.pdfIn PDF document text
    • http://lanejaselisipu.22web.org/focused_acceptance_and_commitment_therapy.pdfIn PDF document text
    • https://fibimijisu.weebly.com/uploads/1/3/4/4/134461798/vefobutifuwesa.pdfIn PDF document text
    • https://dugaposiga.weebly.com/uploads/1/3/4/8/134857723/85ce9.pdfIn PDF document text
    • https://cdn.sqhk.co/zovitamojim/aiegfia/kung_fu_hustle_full_movie_english_sub.pdfIn PDF document text
    • https://cdn.sqhk.co/tuxonewebuke/3hd5Sii/jujarikupozumejotoz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://suniwuvujibo.epizy.com/the_distributive_property_worksheet_answers_milliken_publishing.pdfIn PDF document text
    • http://sewevikefusox.epizy.com/character_and_setting_graphic_organizer.pdfIn PDF document text
    • http://wovovaj.rf.gd/skin_color_rgb_values.pdfIn PDF document text
    • http://fogalefudomuj.epizy.com/jevuwasasulogodera.pdfIn PDF document text
    • http://newumil.epizy.com/zugilatavafabukobatune.pdfIn PDF document text
    • http://fovabikomap.epizy.com/rumpelstiltskin_story_summary.pdfIn PDF document text
    • http://bikawojesagoso.rf.gd/pulmonary_embolism_esc_guidelines_2014_ppt.pdfIn PDF document text
    • http://putojeferef.rf.gd/the_book_of_awakening_free_download.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_off0000e5a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5A3 4840 bytes
SHA-256: cf2f85c731e94489175899a9809c5c0d44900c9713039127468ffe4b43f35aba
font_01_sfnt_off0000f63c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF63C 11168 bytes
SHA-256: a0b054a1d8d9bf8be3915a975945f7a113dde5ace6ca6251e92ae7e918207358

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