Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fa1d0cabb0e38bc…

MALICIOUS

PDF

88.5 KB Created: 2021-03-15 02:51:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: cf6aace97e766f54691dd61e3d21445a SHA-1: cc23322daa879e0a14d709ed552d8aa7f4a5bfc2 SHA-256: 2fa1d0cabb0e38bc01b465960eba440217200443e085cdefb77aba339d1c3755
134 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains embedded links that redirect to known malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The ML classifier also flagged the document with high confidence. The document body appears to be obfuscated or corrupted, but the presence of redirector links suggests a phishing or scam attempt, likely to download further malware or lead to a credential harvesting page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • 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://crophysi.ru/123?utm_term=aditya+hridayam+stotram+pdf In PDF document text
    • https://dixevivoruze.weebly.com/uploads/1/3/1/4/131437918/9916094.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401694/normal_602548eae5d85.pdfIn PDF document text
    • http://naxajogilelog.medianewsonline.com/graphing_slope_intercept_form_worksheet.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476927/normal_60300f24c88bb.pdfIn PDF document text
    • https://dujinagipufamod.weebly.com/uploads/1/3/4/5/134587046/siduluxukiro-velewunonefiv-didadoregejef.pdfIn PDF document text
    • http://kuxni.su/nissan_xterra_service_engine_soon_reset4qatd.pdfIn PDF document text
    • http://copyrighthelpcentral.com/29980740356vu5pw.pdfIn PDF document text
    • http://wekeb.space/pebupudukawekabiviguvqilr.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470699/normal_6044d872da5da.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410459/normal_5fe6a600e67cd.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/gidibesuxi/pilujiw.pdfIn PDF document text
    • https://s3.amazonaws.com/juzewojavomofew/how_do_i_put_my_logitech_mouse_into_pairing_mode.pdfIn PDF document text
    • https://s3.amazonaws.com/fukepez/who_is_the_best_criminal_defense_attorney_in_atlanta.pdfIn PDF document text
    • http://bumufemukelogik.epizy.com/how_to_close_a_polaroid_600_land_camera_automatic_210.pdfIn PDF document text
    • http://sekijipaladi.epizy.com/42453103522.pdfIn PDF document text
    • http://dizepeliw.epizy.com/12367340671.pdfIn PDF document text
    • http://zigexejumex.epizy.com/43872259381.pdfIn PDF document text
    • https://s3.amazonaws.com/pegek/4794490974.pdfIn PDF document text
    • http://gegilifopom.myartsonline.com/panum.pdfIn PDF document text
    • http://leranijaw.rf.gd/renox.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_off00011153.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11153 4904 bytes
SHA-256: d763a46b09b09f3bef96b75243a67e6541cc390f5e755c1198c79022057b07b7
font_01_sfnt_off00012205.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12205 10760 bytes
SHA-256: b4e2ee1704fceff84ea79adeb9aaa0d8f57561cf4e69676f025a9b7a4c9b1647
font_02_sfnt_off000146da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x146DA 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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