Malicious PDF — malware analysis report

Static analysis result for SHA-256 a814bf930e5637f6…

MALICIOUS

PDF

42.2 KB Created: 2020-11-07 11:28:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 04105959ee65affab105bdd048bd057f SHA-1: 4fc098f144d4efb2b2ddcb7092ec4e2335276cc9 SHA-256: a814bf930e5637f6b327e9543a5b48eeb1416128c7e6ab3ffb2fff354f012a22
184 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://traffking.ru/123?keyword=doom+3+unblocked+games In PDF document text
    • https://junoxavod.weebly.com/uploads/1/3/1/3/131384771/fuxazomita.pdfIn PDF document text
    • https://zemodeviwiteg.weebly.com/uploads/1/3/4/3/134351550/nekin_luvomu.pdfIn PDF document text
    • https://pafuwaron.weebly.com/uploads/1/3/4/3/134385690/e66eea7380.pdfIn PDF document text
    • https://palozemoxapido.weebly.com/uploads/1/3/4/3/134366311/1295481.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://nifonuso.files.wordpress.com/2020/11/xerikegulibefomumov.pdfIn PDF document text
    • https://rejepepari.files.wordpress.com/2020/11/easy_rock_piano_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/rizijubovapuk/clifton_fine_school_district.pdfIn PDF document text
    • https://tirokitita.files.wordpress.com/2020/11/3245322306.pdfIn PDF document text
    • https://pabujupemu.files.wordpress.com/2020/11/mixemisaminune.pdfIn PDF document text
    • https://s3.amazonaws.com/jumedemimo/mobusugilenugisafavaker.pdfIn PDF document text
    • https://s3.amazonaws.com/betefowubevat/the_black_cat_study_questions.pdfIn PDF document text
    • https://bamadebib.files.wordpress.com/2020/11/73417890042.pdfIn PDF document text
    • https://sejopaguvit.files.wordpress.com/2020/11/30366305091.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_off00006387.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6387 5532 bytes
SHA-256: 4f8eb27a69bf5c5f1df997d8dd420355f4fec221660c5dd80917b9f4d56daf56
font_01_sfnt_off0000764c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x764C 11124 bytes
SHA-256: 89a2fa270e8443b6555f532eb6509e1467e80e4b302e5ffe55cc7d0444842766

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