Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa9e7b89877b7e7c…

MALICIOUS

PDF

48.6 KB Created: 2020-11-06 22:10:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-11
MD5: 6a74889beb78166f9fb163faece5492f SHA-1: b75e426c9d6724862668610b1f52696daff2389d SHA-256: aa9e7b89877b7e7cdcb5797e7a435f4ca35ec540fb5647fe2c043eb6da6af031
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://traffset.ru/123?keyword=mario+kart+double+dash+hd+textures PDF link annotation
    • https://birivuben.weebly.com/uploads/1/3/4/6/134618962/miguzo.pdfIn PDF document text
    • https://jurexufibemoso.weebly.com/uploads/1/3/4/3/134310147/pemevovoneti.pdfIn PDF document text
    • https://godowipi.weebly.com/uploads/1/3/4/5/134520373/gujumazubutujised.pdfIn PDF document text
    • https://jenititufevi.weebly.com/uploads/1/3/4/5/134595561/030185f0dc16b9.pdfIn PDF document text
    • https://dimaxafazeza.weebly.com/uploads/1/3/1/4/131453031/kezedivalo-bolumukejufufik.pdfIn PDF document text
    • https://vewusijonaw.weebly.com/uploads/1/3/4/4/134489037/dataruwulokuxif.pdfIn PDF document text
    • https://zulewawasukuxu.weebly.com/uploads/1/3/4/5/134581955/vadumexuwigedatewer.pdfIn PDF document text
    • https://kidunaxu.weebly.com/uploads/1/3/1/4/131437100/nesake_zaparuf_dewire_pekuxowapigedis.pdfIn PDF document text
    • https://fewevivib.weebly.com/uploads/1/3/0/8/130813821/sopaxoduwojorojobu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/nabifovu/25883238939.pdfIn PDF document text
    • https://pupirod.files.wordpress.com/2020/11/nozemapopumetuve.pdfIn PDF document text
    • https://rujimalik.files.wordpress.com/2020/11/duwikadefuditebovaganig.pdfIn PDF document text
    • https://s3.amazonaws.com/wepeliniru/viking_long_table_plans.pdfIn PDF document text
    • https://s3.amazonaws.com/vuliwisuwig/gastrointestinal_tract_infection.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/33488766487.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007309.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7309 4964 bytes
SHA-256: 46f19281a3725e5e4c2c1ef44bb6b795e656141984ca823d0313535ac95e9763
font_01_sfnt_off00008403.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8403 10208 bytes
SHA-256: d923afac40783a598a3bfdba38e22d54bfddcc149bc716750918576ef3b8a7ca
font_02_sfnt_off0000a727.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA727 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3