Malicious PDF — malware analysis report

Static analysis result for SHA-256 6647c13a19329649…

MALICIOUS

PDF

78.5 KB Created: 2021-03-24 14:27:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 86b9ba713bf000026b225a7a8cfd3f0f SHA-1: d4b56597c0d8c294b5fa0881af332a9f919ad7ac SHA-256: 6647c13a193296495e733cbed64c83d8487c97bacc2a7a107e2d75e2a400f3b3
196 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external links, including a link farm and an SEO redirector, suggesting an attempt to drive traffic to malicious sites. The presence of embedded URLs and the overall structure point towards a phishing or malware distribution scheme, likely using a spearphishing attachment as the initial access vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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.
  • 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.
  • 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://lozipotod.ru/wix?keyword=dental+adventure+2+game PDF link annotation
    • http://vnds-v.website/ap_studio_art_concentration_questionsnvrh7.pdfIn PDF document text
    • https://zapufotipo.weebly.com/uploads/1/3/2/7/132740892/529614.pdfIn PDF document text
    • http://servempieza.site/buwitu709fu.pdfIn PDF document text
    • http://dokojekiferej.mygamesonline.org/fiwigetabisova.pdfIn PDF document text
    • https://fepanaxowa.weebly.com/uploads/1/3/4/3/134311119/2aeb0.pdfIn PDF document text
    • https://dadojunolibete.weebly.com/uploads/1/3/2/6/132683289/103887.pdfIn PDF document text
    • https://vejevidumuruje.weebly.com/uploads/1/3/5/3/135302175/4cb439.pdfIn PDF document text
    • http://taforojujutusig.mygamesonline.org/metodo_analitico_o_pormenorizado.pdfIn PDF document text
    • https://bagekitavaseb.weebly.com/uploads/1/3/1/0/131070055/a675594091fa2.pdfIn PDF document text
    • http://fruit-italy.space/chevrolet_cruze_2013_service_manualqsqva.pdfIn PDF document text
    • http://hotita.space/93680604797gz681.pdfIn PDF document text
    • http://worldworkbook.com/the_aeneid_sparknotes_book_8f5dzr.pdfIn PDF document text
    • https://nukivobiwej.weebly.com/uploads/1/3/4/0/134016752/xusixoxil.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/tobito/mumuji.pdfIn PDF document text
    • https://s3.amazonaws.com/gavexilatuvitaz/video_from_facebook_private_account.pdfIn PDF document text
    • https://s3.amazonaws.com/jifedefujodu/bubas.pdfIn PDF document text
    • https://s3.amazonaws.com/lomogas/bufurugelulexutupaban.pdfIn PDF document text
    • https://s3.amazonaws.com/sixenogafopoj/how_to_cook_rice_in_tefal_mini_compact_steamer.pdfIn PDF document text
    • https://s3.amazonaws.com/megodipewukitoj/ti-30xa_scientific_calculator.pdfIn PDF document text
    • https://s3.amazonaws.com/zoromexemuzid/xesavewiziv.pdfIn PDF document text
    • https://s3.amazonaws.com/defujo/petty_cash_request_voucher_template.pdfIn PDF document text
    • https://s3.amazonaws.com/rizezobabub/at_what_impact_speed_do_side_airbags_deploy.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_off0000f4a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4A4 5160 bytes
SHA-256: e2530809be309252a36904d160baedf9c75d778bf68ef16889a5012edd19cc69
font_01_sfnt_off0001062a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1062A 10864 bytes
SHA-256: af6fa8db6f8cba2050752ac42e8ed1d0a10bb83c063e5c98ebf5ac7b9f3da956

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