Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d411e322845a5a2…

MALICIOUS

PDF

70.8 KB Created: 2021-02-18 10:36:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 058095a99f33348307ae6abb7d66cc77 SHA-1: d69a1ff3d0cf56e3517c9f86bf35dceb19e22bcc SHA-256: 5d411e322845a5a2cbb08b1012ab6c2d51c547915aac025b37dc1e75b6d898cd
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=nail+salons+open+in+cordova+tn PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4408865/normal_601bfabae40af.pdfIn PDF document text
    • https://xoxatujetila.weebly.com/uploads/1/3/0/7/130775098/6487028.pdfIn PDF document text
    • http://xubozogafajus.22web.org/17916522260.pdfIn PDF document text
    • https://wezenazuzive.weebly.com/uploads/1/3/4/7/134764498/zijasabudodubu.pdfIn PDF document text
    • https://lumigoxodavi.weebly.com/uploads/1/3/1/6/131606620/89f9da47.pdfIn PDF document text
    • https://nipetetoxijekuj.weebly.com/uploads/1/3/4/7/134718304/mabusuwipop.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368763/normal_6006ab12cb197.pdfIn PDF document text
    • http://jotusuwes.iblogger.org/54474939445.pdfIn PDF document text
    • https://sirowatogiwu.weebly.com/uploads/1/3/2/8/132814809/pafebevadoxonukolu.pdfIn PDF document text
    • https://febefadu.weebly.com/uploads/1/3/1/4/131453100/2deb5a35b6.pdfIn PDF document text
    • https://nanagufema.weebly.com/uploads/1/3/1/4/131483019/b9eeca283bc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421205/normal_5fe398a055d6a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xenuduximowub.epizy.com/88306764429.pdfIn PDF document text
    • https://s3.amazonaws.com/tezofuretejom/calculator_in_android_studio_java.pdfIn PDF document text
    • https://s3.amazonaws.com/rodakarugupoko/acids_and_bases_worksheet_middle_school.pdfIn PDF document text
    • https://s3.amazonaws.com/tesasubawalozan/challenger_scat_pack_manual_review.pdfIn PDF document text
    • https://s3.amazonaws.com/dedinavesute/891013142.pdfIn PDF document text
    • https://s3.amazonaws.com/kewakuko/6879210941.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_off0000d837.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD837 5096 bytes
SHA-256: 029efe5c899e516120b9ef3dd8108b9d4f6cb9a4415718f79df5977cf4dbf177
font_01_sfnt_off0000e9a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9A4 10880 bytes
SHA-256: 615dab45822dfd34c7bf76e372efda5b7ea051cea86d2f251ae9df57bd0abd8a

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