Malicious PDF — malware analysis report

Static analysis result for SHA-256 5dc323a62dd8abae…

MALICIOUS

PDF

70.5 KB Created: 2021-02-18 15:43:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 3a27dbbb03c27103c1ee20967aa36230 SHA-1: 7e41db456a73aa0f6dca1bd615ec1ae8ca47b196 SHA-256: 5dc323a62dd8abae061b2d0807512848d571c6de246b0913a2debd712fa22946
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://maypoin.ru/123?utm_term=hp+laserjet+1320n+datasheet PDF link annotation
    • https://zemapefim.weebly.com/uploads/1/3/4/4/134485651/9168352.pdfIn PDF document text
    • http://kpovli.ru/lonerism_hoodie_for_saleqznk5.pdfIn PDF document text
    • https://fewirikikekaja.weebly.com/uploads/1/3/2/3/132302896/50b2aa1f7d63ea.pdfIn PDF document text
    • http://cardio-natural.info/nufesimuvode0m5oo.pdfIn PDF document text
    • https://cdn.sqhk.co/rolidazi/Gic3EIa/90561828150.pdfIn PDF document text
    • https://xitapazutirubej.weebly.com/uploads/1/3/4/8/134882608/xijefigesar_kuwalabi_jonuxoj.pdfIn PDF document text
    • https://rubosesizip.weebly.com/uploads/1/3/4/7/134744628/foxazijanom.pdfIn PDF document text
    • https://dogaralezuj.weebly.com/uploads/1/3/1/6/131637140/kagewo.pdfIn PDF document text
    • https://jupurelapuloful.weebly.com/uploads/1/3/3/9/133997255/1b743b7e475b39.pdfIn PDF document text
    • https://jinonapipi.weebly.com/uploads/1/3/4/4/134481743/zigalivaje.pdfIn PDF document text
    • https://kodabovoxalomas.weebly.com/uploads/1/3/5/3/135340354/7417361f931517.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/nolarifaforuxop/tujabo.pdfIn PDF document text
    • https://s3.amazonaws.com/tiluwisulepam/47386490543.pdfIn PDF document text
    • https://s3.amazonaws.com/fadedosi/anticoagulation_in_renal_failure_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/fizaxo/tidofelonojazufase.pdfIn PDF document text
    • https://s3.amazonaws.com/kexamoxusinixu/printable_brain_teasers_worksheets_for_middle_school.pdfIn PDF document text
    • https://s3.amazonaws.com/wujodibu/87053242261.pdfIn PDF document text
    • https://s3.amazonaws.com/foneniz/pandora_size_guide_bangle.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_off0000d480.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD480 5576 bytes
SHA-256: 17b773bcb2282f51db2117778ca5b1aed5d16774fb56667cc56fc54812a55282
font_01_sfnt_off0000e76f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE76F 12032 bytes
SHA-256: 051eb6c31a5687b12bdc479537925d8bc2ffb384ad46b6be3f149848b4d3a605