Malicious PDF — malware analysis report

Static analysis result for SHA-256 d335afc5e1186edd…

MALICIOUS

PDF

70.5 KB Created: 2021-02-14 06:26:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: a46b547bdf81c6c018e5046452366891 SHA-1: 5e9cc4cf258e85cbafae63dc8be49e45df7aa07a SHA-256: d335afc5e1186edd8d94b67a2b27c55e7c8b7b7e42a9ef66fab1f922ac21b8f3
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://seumenha.ru/123?utm_term=1+clue+5+words+answers PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4495395/normal_6001eab0dd815.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490272/normal_5ffb688716617.pdfIn PDF document text
    • https://cdn.sqhk.co/dosojegomugu/baVhfgg/mymcps_portal_staff.pdfIn PDF document text
    • https://kexanitafax.weebly.com/uploads/1/3/0/8/130813084/7871c.pdfIn PDF document text
    • https://xizonadap.weebly.com/uploads/1/3/5/3/135326441/junofafazemoru.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497697/normal_6022c436e12de.pdfIn PDF document text
    • https://kumumejetosen.weebly.com/uploads/1/3/0/9/130969188/dirowoxapejatuw-wikobufa-poloxobefe.pdfIn PDF document text
    • http://xukekutotipepet.iblogger.org/37858748341.pdfIn PDF document text
    • https://mirinojasuri.weebly.com/uploads/1/3/4/5/134588432/9666288.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jojanotesejivi.epizy.com/wesnoth_heir_to_the_throne_guide.pdfIn PDF document text
    • http://bafuxinasu.epizy.com/health_canada_food_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/xanunafojuloki/61949287414.pdfIn PDF document text
    • https://s3.amazonaws.com/norozovijalu/all_time_popular_english_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwisigetizoxif/game_adventure_3d_offline_android_terbaik.pdfIn PDF document text
    • https://s3.amazonaws.com/babetafaperaxov/10343328629.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_off0000d87e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD87E 5108 bytes
SHA-256: 5eb9fb3f3bd5142f3b80ece2e83990fc58b245fe8e4fad520c2b1cc8b7ec0c01
font_01_sfnt_off0000ea03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA03 10420 bytes
SHA-256: bc6bbe04e7b285c034716d272d24d717a0ed7ebe44ee04f83b6cb866eebac6f6