Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7ef8c251fdb2625…

MALICIOUS

PDF

72.7 KB Created: 2021-02-19 10:50:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 90195333bd5834f1df1091eb0a147984 SHA-1: 1660d8f59dc5bcb6592fd8d0c430969e9e007b89 SHA-256: a7ef8c251fdb26257fa8f30de723eed42dcda5171f78ebaa3bea4cb453e8b6ba
194 Risk Score

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://crophysi.ru/aws?utm_term=harry+potter+book+8+review In PDF document text
    • https://cdn-cms.f-static.net/uploads/4426087/normal_601370ebb08f4.pdfIn PDF document text
    • http://alex-chekalev.com/yashachi_parikrama_magazine_free_downloadsprdr.pdfIn PDF document text
    • http://salestore.pro/listening_practice_through_dictation_google_drivejiv2t.pdfIn PDF document text
    • https://cdn.sqhk.co/misumirotoj/jchgV8s/ninja_turtles_costume_shirt.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501383/normal_5fd8e6af6d5f2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483103/normal_5fdaed809b554.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410414/normal_5ffdb086deebd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380531/normal_5fd73112c901b.pdfIn PDF document text
    • https://cdn.sqhk.co/kofosenolo/yic2hcp/jifavejusonuxafa.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/luropiw/fuduluwululirepiruzorug.pdfIn PDF document text
    • https://s3.amazonaws.com/ganubifirigevi/60653182745.pdfIn PDF document text
    • https://s3.amazonaws.com/datarofapakil/sanat_kumara_ascended_master_guided_meditation.pdfIn PDF document text
    • https://s3.amazonaws.com/tixeligufokup/bakawanokijinasefiwufi.pdfIn PDF document text
    • http://kimitumepogamom.epizy.com/lord_durham_report_1839.pdfIn PDF document text
    • https://s3.amazonaws.com/navoburarovada/cringe_in_fear_crossword_answer.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_off0000e1b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1B1 5216 bytes
SHA-256: b27679ebbe74363197aa9005e1a363d058aab43ea621c476ec8664e921bf90d1
font_01_sfnt_off0000f397.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF397 10240 bytes
SHA-256: 2b8de95dc621f89cf00ef981a3ab38cc4b17583861ab6e3e8dd719a937e41956