Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e2f0727d75d28a4…

MALICIOUS

PDF

66.9 KB Created: 2021-02-13 00:02:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: c2992282ae9310474ad3aa55940bce4b SHA-1: 9a57f0200a1b5338dfe83349ea84cce5f81d9a80 SHA-256: 7e2f0727d75d28a49913175e954ae02c400759a7cb547a1ebe51de20380eff9e
254 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
  • 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.
  • 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://yafferge.ru/wix?keyword=mortal+kombat+x+ios+hack+no+jailbreak In PDF document text
    • https://static.s123-cdn-static.com/uploads/4467322/normal_5fed72751b40f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453732/normal_60153efa20bbd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415767/normal_5fff81f9900c3.pdfIn PDF document text
    • https://polovetanofup.weebly.com/uploads/1/3/5/3/135330247/17fb6b0d7a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414867/normal_5ff969b97da06.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473892/normal_5fe2a4c0a3a8a.pdfIn PDF document text
    • https://musekakilex.weebly.com/uploads/1/3/1/4/131406804/2155152.pdfIn PDF document text
    • https://cdn.sqhk.co/jofijoju/jjjbihV/line_graph_x_and_y_axis_scale.pdfIn PDF document text
    • https://cdn.sqhk.co/jigekuragige/sgdugge/efootball_pes_2021_season_update_gameplay.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469643/normal_6002a71fe4ba4.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/jezobasit/math_worksheets_for_prime_and_composite_numbers.pdfIn PDF document text
    • https://s3.amazonaws.com/waduzirader/pujuganemeju.pdfIn PDF document text
    • https://s3.amazonaws.com/fekaduvopigab/xelapepobuv.pdfIn PDF document text
    • https://s3.amazonaws.com/mexesazaxasa/mavajilew.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_off0000c7e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7E8 5392 bytes
SHA-256: 56167f482244b4d3ab74d9fa95571c9c9bd93fba06d9ed34b3fe81e0da56e5a2
font_01_sfnt_off0000da1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA1E 11484 bytes
SHA-256: 1da3466f3ccf3946133f915c08f01020186bed3a47c2251358d71282c9acbb97

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