Malicious PDF — malware analysis report

Static analysis result for SHA-256 27c918f0394a13dc…

MALICIOUS

PDF

73.3 KB Created: 2021-02-12 21:33:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 4ad570e6928f3954cb1865b338e2f2ea SHA-1: 74e919e618cc2983d57d1671addf2b587986aa1a SHA-256: 27c918f0394a13dc16973859b2e672f8d1f5c14f1a04b9bcd46075e439b079c6
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://yafferge.ru/123?utm_term=caron+yarn+color+chart In PDF document text
    • https://static.s123-cdn-static.com/uploads/4382617/normal_60005957df592.pdfIn PDF document text
    • https://cdn.sqhk.co/nejibija/d6iUjgL/ice_cream_cup_cake_maker_doll_making_games.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457838/normal_5fd6685b8f6b0.pdfIn PDF document text
    • http://otomail.business/tifadoverenikyk6a1.pdfIn PDF document text
    • https://cdn.sqhk.co/joremeve/hdJNZie/movie_quotes_quiz_questions.pdfIn PDF document text
    • http://opit.space/bassett_s_licorice_allsorts_nutritional_informationf0aaq.pdfIn PDF document text
    • https://cdn.sqhk.co/zurefaxenov/ZjjjfUn/sub4sub_pro_apk_mod.pdfIn PDF document text
    • http://drilltech.info/Ursachen_der_Bauchspeicheldrse_Infehm48v.pdfIn PDF document text
    • https://cdn.sqhk.co/kinanekoxo/g9gcgj2/monster_jam_zombie_vs_hunter.pdfIn PDF document text
    • http://watutuwox.iblogger.org/20405572037.pdfIn PDF document text
    • http://fishland.store/template_powerpoint_kerency4w8.pdfIn PDF document text
    • https://cdn.sqhk.co/xubulozirod/iGgRzhc/jonenazitajutamumugifej.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/wiremeresegikon/functional_data_analysis_ramsay.pdfIn PDF document text
    • https://s3.amazonaws.com/gomaxod/godixabi.pdfIn PDF document text
    • http://tojizuwit.epizy.com/73046853467.pdfIn PDF document text
    • https://s3.amazonaws.com/lofese/jatikexefodareredinoj.pdfIn PDF document text
    • https://s3.amazonaws.com/voxipanovigepiv/pupugufedekafufiriva.pdfIn PDF document text
    • https://s3.amazonaws.com/zarevizebi/2218642250.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_off0000e291.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE291 4716 bytes
SHA-256: 5901b5b9e35e609178499e75534a79d4d4daab3f3b70419b2629137bb3bb2877
font_01_sfnt_off0000f299.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF299 10688 bytes
SHA-256: f3cc9cdea6c8cee41456526c26b2f0af64626fb7b7047fff25c87c2098a86c44

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