Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fea6b2f7722416b…

MALICIOUS

PDF

40.0 KB Created: 2020-11-05 16:22:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-15
MD5: 6c641d7403ea8741bee077c5a14cd8dd SHA-1: 249ff00c302d9e159941c88ca9e87e006a1f69af SHA-256: 6fea6b2f7722416be975636b3d81adc850de2ac64811a656e46f1e9c44d76214
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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://trafficel.ru/aws?keyword=troop+guide+ideas PDF link annotation
    • https://tilobumofiraji.weebly.com/uploads/1/3/4/4/134492377/lumadopetog.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/wavaduluwawajoramitu.pdfIn PDF document text
    • https://wetuxabo.weebly.com/uploads/1/3/0/8/130873937/muzitoguk_sulenutinefen.pdfIn PDF document text
    • https://tubenuluni.weebly.com/uploads/1/3/1/4/131437864/3cb839f757cc7.pdfIn PDF document text
    • https://jusopara.weebly.com/uploads/1/3/2/6/132681150/gezekimenare_mutiguluwet_jodadewezen.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/nuxulikiwab/cgst_act_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/fatikonavori/33986964898.pdfIn PDF document text
    • https://s3.amazonaws.com/jipowumat/basic_punctuation_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/tizowodifi/wezem.pdfIn PDF document text
    • https://s3.amazonaws.com/rizijubovapuk/define_actus_reus_act.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_off00005daa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DAA 5044 bytes
SHA-256: 89c61438054beffc354ea791ce88367eeab7db6faef3e04f0151d86926d97f8e
font_01_sfnt_off00006ee1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EE1 10848 bytes
SHA-256: 19c9b2579b4fc4d63994f285b3446f6e9b8605fd0cb4ad4056639a1f371f1227