Malicious PDF — malware analysis report

Static analysis result for SHA-256 53d2f56e4a5efa0f…

MALICIOUS

PDF

73.0 KB Created: 2021-01-30 07:01:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 4f81910403fafc9bfa5fd77472d3edbb SHA-1: 44a01d4551a808066a1b6bb4529e32268078444b SHA-256: 53d2f56e4a5efa0fb6c2cea608e0c51baec13df0b4f26d32b5ab272d6d0e1067
194 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains embedded links pointing to a known malicious redirector, identified by heuristics as a phishing lure related to 'large square painting canvas'. ML classification and ClamAV detection strongly indicate malicious intent, specifically classified as Pdf.Phishing.Trojan. The document body, though heavily obfuscated, appears to contain metadata related to its creation, further suggesting it's not a legitimate document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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.
  • 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://gettraff.ru/wb?keyword=large%20square%20painting%20canvas In PDF document text
    • https://static.s123-cdn-static.com/uploads/4422180/normal_5ffc8edd944b2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366305/normal_600ea2e61069f.pdfIn PDF document text
    • http://marketitaly.info/paints_and_varnishes_notesrlgnv.pdfIn PDF document text
    • http://nigasheff.xyz/78162174005hk7na.pdfIn PDF document text
    • http://regsen.website/ejen_ali_emergency_mod_apk_all_unlocked4415a.pdfIn PDF document text
    • http://daravto18.ru/rivoxuxubewanijosoxni3j.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454677/normal_5fc691d306a93.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392861/normal_5fed96739026c.pdfIn PDF document text
    • http://itprod.space/the_art_of_strategy_a_game_theorists_guide_to_success_in_business_and_life_downloadj2y7p.pdfIn PDF document text
    • http://detonic-ordina.website/57661973955ty5r6.pdfIn PDF document text
    • http://fullhp.info/woods_tents_set_up_instructionspbamg.pdfIn PDF document text
    • http://shoop-fo.ru/80s_hit_singles_ukqdzhj.pdfIn PDF document text
    • http://vizit.store/suwin3ontb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421787/normal_5ff917c50cd94.pdfIn PDF document text
    • http://onsideball.info/sidokalatisejuvokaw0dgc.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/pevarijidasalop/pojimejenutin.pdfIn PDF document text
    • https://s3.amazonaws.com/puretulenuza/quadratic_equation_word_problems_worksheet_doc.pdfIn PDF document text
    • https://s3.amazonaws.com/xeropizuwe/church_of_england_wedding_welcome_form.pdfIn PDF document text
    • https://s3.amazonaws.com/zunewidimem/toram_leveling_guide_katana.pdfIn PDF document text
    • https://s3.amazonaws.com/rixevozajixezos/40709715301.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_off0000e303.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE303 5196 bytes
SHA-256: 6b4fbe23b4e5995e23236c380d459e337ec7b8c3b4d032a18fceca21f60baaf0
font_01_sfnt_off0000f4ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4CE 10068 bytes
SHA-256: dd86afd15504fd2e36081ae12c5c8612d05d26ce4d9d8e7ea50415dc015a8017

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