Malicious PDF — malware analysis report

Static analysis result for SHA-256 432816bdabc2f689…

MALICIOUS

PDF

44.5 KB Created: 2020-10-28 16:04:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 62aead4c84d4309177cdda64246d633e SHA-1: 56077f469120210378133c7feff07c0e24208633 SHA-256: 432816bdabc2f689a1793bb22648f15e9ca190c45c5f167fd724ad5b1b9f803f
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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://ttraff.me/123?keyword=the+impossible+quiz+3+for+school In PDF document text
    • https://jovikuveditowe.weebly.com/uploads/1/3/0/8/130874612/9227132.pdfIn PDF document text
    • https://riwisasivituw.weebly.com/uploads/1/3/1/0/131070703/lakorixa.pdfIn PDF document text
    • https://veraweno.weebly.com/uploads/1/3/0/7/130739577/6462721.pdfIn PDF document text
    • https://jelamiwigu.weebly.com/uploads/1/3/1/3/131382248/xulumesibexu.pdfIn PDF document text
    • https://joleziravakejar.weebly.com/uploads/1/3/4/4/134460301/wuvadiwudow.pdfIn PDF document text
    • https://vilukenuxe.weebly.com/uploads/1/3/2/8/132814007/6bb049792.pdfIn PDF document text
    • https://mogilifus.weebly.com/uploads/1/3/0/7/130739831/tixobenudofezibet.pdfIn PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/rotizizalipi-xulejowo-wegevok-xutijub.pdfIn PDF document text
    • https://disadaniti.weebly.com/uploads/1/3/4/4/134463451/vukazuninu-gutufisevuwikab-tamope-silubaz.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/baxegezivumi/sbi_exam_syllabus.pdfIn PDF document text
    • https://s3.amazonaws.com/dukajevo/94403555939.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bbaaba8c-637e-40c7-bc4f-83c27e85bc86/30452684439.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67ab3c1c-a2b4-4f78-ba3b-4b0d8c0b1009/c_primer_plus_book.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/english_word_meaning_in_hindi_download.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/96418929734.pdfIn PDF document text
    • https://s3.amazonaws.com/luramamelolem/27452303842.pdfIn PDF document text
    • https://s3.amazonaws.com/sazixipame/38152359750.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/76282205044.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_off00006f6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F6C 5476 bytes
SHA-256: 96376215a2edb3de05353299849ee500e36335443ae98e0706a8751e0c2bda4a
font_01_sfnt_off000081ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81EF 10240 bytes
SHA-256: 2f38b49e7da156d687a9b5f9da064347295fc0b1d7e58f239fe7dcc6861b0cc2

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