Malicious PDF — malware analysis report

Static analysis result for SHA-256 1075a25dab84d8b7…

MALICIOUS

PDF

74.0 KB Created: 2021-02-21 00:22:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 0bb04a9e7288a7e488e3d21fc0fd0450 SHA-1: 9381d12da8dbac6a21c4696db6a168d5197d6356 SHA-256: 1075a25dab84d8b7c61a7c3cf115705d87a4cc9d6893e2e414fe11a394734e5d
202 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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.
  • 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.
  • 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
  • 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/aws?utm_term=drawing+on+the+right+side+of+the+brain+lesson+plans In PDF document text
    • https://cdn-cms.f-static.net/uploads/4447647/normal_600c1c909b95a.pdfIn PDF document text
    • https://cdn.sqhk.co/zefadanexa/0Mic3Su/lines_physics_drawing_puzzle.pdfIn PDF document text
    • http://pasetbs.xyz/fibinomenisititegofukxo17t.pdfIn PDF document text
    • http://givepamodugag.22web.org/94415369152.pdfIn PDF document text
    • http://rojenugilin.22web.org/31685202942.pdfIn PDF document text
    • https://cdn.sqhk.co/surikuzezun/ptiddhe/2108366819.pdfIn PDF document text
    • https://cdn.sqhk.co/sadirurafixi/hhcIMgi/7566101198.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482407/normal_602d678ace10c.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/musoxifuvitalo/80282751399.pdfIn PDF document text
    • https://s3.amazonaws.com/ronatiduzoxij/how_to_cut_box_joints_with_a_router_table.pdfIn PDF document text
    • https://s3.amazonaws.com/nojemi/vovuximu.pdfIn PDF document text
    • https://s3.amazonaws.com/dojonuta/holcim_philippines_annual_report_2017.pdfIn PDF document text
    • https://s3.amazonaws.com/juzowilipi/google_docs_to_do_list_template.pdfIn PDF document text
    • http://gifesikubelazu.epizy.com/shark_cartoon_images_hd.pdfIn PDF document text
    • http://zugodelojuj.epizy.com/26502575202.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_off0000e36b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE36B 5532 bytes
SHA-256: 34b1de03bb782c3e990e2809e7ff09cbe5ffc914ebb7c590293bf0bc02e93d5c
font_01_sfnt_off0000f647.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF647 10240 bytes
SHA-256: 1f2c0715868b7697ed1793530a1f6e5566fdcd9139869c55e45474b61dd6f2d5