Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb31a3e486de6855…

MALICIOUS

PDF

69.9 KB Created: 2021-02-12 19:21:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 6826b39ae776a3f117d02829423d9bac SHA-1: 9ed914975b7481a88e19eddd8c0bbaf39eb51787 SHA-256: eb31a3e486de6855b4f33340ef61d270f6ec452b6c5fce2622b4ee575f546af4
254 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.
  • 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.
  • 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/wix?keyword=music+download+online+unblocked In PDF document text
    • https://fudolimag.weebly.com/uploads/1/3/4/5/134586879/2a07c61cf2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412778/normal_5fce166949e77.pdfIn PDF document text
    • https://musagitunoton.weebly.com/uploads/1/3/4/3/134368320/3853680.pdfIn PDF document text
    • http://mx50off.pro/desene_animate_in_romana_bradul_de_c1x1ve.pdfIn PDF document text
    • https://cdn.sqhk.co/zetanitanedo/S4idUaD/lebarumakidunepib.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419826/normal_5ff88c08de1b7.pdfIn PDF document text
    • https://cdn.sqhk.co/wiwibibowow/RhgUihj/vunumubarukapizotiwulonon.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4497685/normal_5fe09a9333a28.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/nijosinizo/forgetting_sarah_marshall_dracula_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/bupaxomu/lagu_shooting_star_meme.pdfIn PDF document text
    • https://s3.amazonaws.com/dazutun/chronic_low_back_pain_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/nopomewegobij/aldehydes_and_ketones_reactions.pdfIn PDF document text
    • https://s3.amazonaws.com/neporezofov/vadojone.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d7d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7D8 5140 bytes
SHA-256: 62e002ac19621a564ee3559762205b27b6c5f20fd91668ee49155703b8b9fb34
font_01_sfnt_off0000e984.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE984 9856 bytes
SHA-256: ed05642cf55186b040c4107fb36f165cb4d07fd57452b0620e096039afa930b9

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