Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2fc7bbb181e5166…

MALICIOUS

PDF

72.1 KB Created: 2021-02-19 02:39:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 7c757b2bc9df860177807112ef229055 SHA-1: fbc4b2d0258cd6b6578a47fb21b948663ba07c63 SHA-256: a2fc7bbb181e5166d8ce0e4ac1750d24ca6425ad02dee29af1e913d6eef001a9
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jacksth.ru/wix?keyword=the+great+gatsby+test+pdf PDF link annotation
    • https://komomofuxuz.weebly.com/uploads/1/3/4/4/134494735/xomokaf_zaterinuti_larumigurive.pdfIn PDF document text
    • https://bobefadapuxat.weebly.com/uploads/1/3/4/8/134858353/2683637.pdfIn PDF document text
    • https://bipokedofep.weebly.com/uploads/1/3/5/3/135322207/dd1e0ef4d7aa.pdfIn PDF document text
    • https://mipikarekegimo.weebly.com/uploads/1/3/1/6/131606279/tesaf_wixasaxo_jiwav.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
    • https://s3.amazonaws.com/tunenijexe/pericarditis_treatment_guidelines_2015.pdfIn PDF document text
    • https://s3.amazonaws.com/solonebosop/11694534722.pdfIn PDF document text
    • http://zigerakujig.rf.gd/88716103837.pdfIn PDF document text
    • https://s3.amazonaws.com/nodetuxapabara/spotify_app_apk_mirror.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwuzerijofa/duffle_bag_pattern_free.pdfIn PDF document text
    • https://s3.amazonaws.com/xixonu/mijewigavusezisurabovotu.pdfIn PDF document text
    • https://s3.amazonaws.com/jepavilutabilel/request_reference_letter_from_former_employer.pdfIn PDF document text
    • https://s3.amazonaws.com/legenapi/ibm_jcl_interview_questions_and_answers.pdfIn PDF document text
    • http://pejoneke.rf.gd/tax_breaks_for_small_business_owners.pdfIn PDF document text
    • https://s3.amazonaws.com/bitajemisajoz/present_simple_tense_worksheet_esl.pdfIn PDF document text
    • http://gadoxijumulop.epizy.com/kanivekuvukivu.pdfIn PDF document text
    • https://s3.amazonaws.com/rimejiguvif/69805516889.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_off0000d0c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0C8 4984 bytes
SHA-256: a6457a74b76d4e25f31718ebb3c6c7cba49a81a137b5e276b39d02981a161b3e
font_01_sfnt_off0000e1d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1D1 10300 bytes
SHA-256: 4b94fe9d8cc49f408ad054af072e02e4fa6732138da0282be1ad6b43119f89ee
font_02_sfnt_off000104ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104EA 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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