Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9bbc180d0f17d66…

MALICIOUS

PDF

51.1 KB Created: 2020-11-06 13:06:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-15
MD5: 4daf2c80ab43d3d592c96925beadd17f SHA-1: c993794bd868143e78b915d9fc9ef5729c101c0f SHA-256: d9bbc180d0f17d66cd6867056c259932b1069e790b470d4ab9c271a9a03726ec
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=lt+property+management+new+orleans PDF link annotation
    • https://masogipu.weebly.com/uploads/1/3/1/6/131606875/gadifakiwowe.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/fizijosoraginu/90525897716.pdfIn PDF document text
    • https://s3.amazonaws.com/pewibim/hand_washing_steps_pictures.pdfIn PDF document text
    • https://s3.amazonaws.com/juvuraguvutoxif/93586198396.pdfIn PDF document text
    • https://s3.amazonaws.com/vexeliku/o_holy_night_piano_solo_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/purawuma/abc_worksheets_for_kindergarten_printables.pdfIn PDF document text
    • https://s3.amazonaws.com/jowutoneranemuk/18076939264.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f058b7d0-e40f-4741-99c5-2a53ac36df3b/rafogevemafozusukat.pdfIn PDF document text
    • https://s3.amazonaws.com/zevutebulaworel/katakupadenu.pdfIn PDF document text
    • https://s3.amazonaws.com/figugipopar/manual_arcmap_10._2.pdfIn PDF document text
    • https://s3.amazonaws.com/pewibim/gekumasotefixesiwip.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_off000088cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88CD 5272 bytes
SHA-256: 9d5080e4a25a717898dbb280737f91ea06141f333522b8155d4a52d9ab357bb0
font_01_sfnt_off00009ac3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9AC3 10780 bytes
SHA-256: 37004101887b79f25a0914b50a9f881b8f7e3b7dc421974595294afaa60b346c