Malicious PDF — malware analysis report

Static analysis result for SHA-256 eae411701fca7669…

MALICIOUS

PDF

41.3 KB Created: 2020-11-03 17:30:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 8c89224cde17ea7f1411050e5b5a2220 SHA-1: 4acc6f9aaa31dc9afe2661c765b913e24f7e6540 SHA-256: eae411701fca76693d471d51d11d1b7dcbe32e22f29014130ee64ceeaff1f5b5
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://cctraff.ru/123?keyword=minecraft+1.2+apk+download In PDF document text
    • https://jikubefu.weebly.com/uploads/1/3/4/3/134318914/notezupozojova.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392877/normal_5f92eb49b5f9c.pdfIn PDF document text
    • https://jixatazibasuv.weebly.com/uploads/1/3/4/4/134402985/tijuli-zomuwojake.pdfIn PDF document text
    • https://saxibodusazo.weebly.com/uploads/1/3/0/7/130740440/tatup-nimijefeji.pdfIn PDF document text
    • https://zeginuvo.weebly.com/uploads/1/3/0/7/130775519/886233.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378599/normal_5f94d3583415b.pdfIn PDF document text
    • https://datirelegewewat.weebly.com/uploads/1/3/4/3/134329883/kudidit_voxujegimesopi_tajadimuwurin_vekim.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369919/normal_5f8d0f037a1aa.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00006490.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00006490.bin)
    • https://s3.amazonaws.com/gupuso/vaxesivavurupetaluga.pdfIn PDF document text
    • https://s3.amazonaws.com/xalasawu/daforiduxatepik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01fab9ba-699b-4aa2-b1f9-0690e875d593/96548174268.pdfIn PDF document text
    • https://s3.amazonaws.com/liguwubore/tipos_de_barreras_arancelarias.pdfIn PDF document text
    • https://s3.amazonaws.com/tokit/43166037913.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 extracted file (font_00_sfnt_off00006490.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006490.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6490 5348 bytes
SHA-256: ce2df34137e84e14b39833fe04103b7fef55337c5c2c8c71a38f5dd03d6eedf8
font_01_sfnt_off00007702.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7702 9916 bytes
SHA-256: fcab02382695767bb44b279e4506e2f6bf1de6bf9cd277177d866977c7dec0b9