Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfce2433cc24865d…

MALICIOUS

PDF

70.2 KB Created: 2021-01-28 12:14:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: fcd3d8822f7f7caa66b1d10ee216db65 SHA-1: cf099ab2bd94135b67c20cf086c107fe45ca68c2 SHA-256: dfce2433cc24865d5b29eaa28bf7ddcd28bc7c7a05d29a695420b4ce8063c9df
202 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=chp+accident+report+form In PDF document text
    • https://cdn-cms.f-static.net/uploads/4408598/normal_5fd91fe59405e.pdfIn PDF document text
    • http://gezudozu.iblogger.org/cache_memory_in_computer_organization.pdfIn PDF document text
    • http://jegewuzewan.iblogger.org/50255193850.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379231/normal_5fcf5a5730fe9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dusetelonuzaj.epizy.com/netemofenulilorow.pdfIn PDF document text
    • https://s3.amazonaws.com/fekazudabo/simer.pdfIn PDF document text
    • https://s3.amazonaws.com/sorogamat/worksheets_on_interrogative_pronouns.pdfIn PDF document text
    • http://bibobega.epizy.com/celine_tam_america_s_got_talent.pdfIn PDF document text
    • https://s3.amazonaws.com/tomaxade/dideka.pdfIn PDF document text
    • https://s3.amazonaws.com/gavobawum/jesunixak.pdfIn PDF document text
    • http://nalirabagetovop.epizy.com/customer_service_training_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/lovetijif/84422493613.pdfIn PDF document text
    • https://s3.amazonaws.com/fenatagazise/vamerekizemiv.pdfIn PDF document text
    • http://sisuraregimu.rf.gd/bridgeton_nj_police_reports.pdfIn PDF document text
    • https://s3.amazonaws.com/sesafefanulokam/ca_itemized_deductions_worksheet_2018.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_off0000d77f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD77F 5088 bytes
SHA-256: 1a54b2d173848b5e6ca0f5b5de42a176cd9fd6d4d4cf753e24d0641315a62d5e
font_01_sfnt_off0000e89f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE89F 10500 bytes
SHA-256: fb87477275b8ffb2260c16698cbb8a65969dec240606d6f7aa170b73f1bff31a