Malicious PDF — malware analysis report

Static analysis result for SHA-256 cac7b0bc11406bff…

MALICIOUS

PDF

43.1 KB Created: 2020-11-07 13:22:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2022-06-20
MD5: 00b399a61815b9fa02d4d328858341fd SHA-1: 9538e38728be1d6da441f9bbcfd59eaf48d848f5 SHA-256: cac7b0bc11406bff05cf7cc894d4b065b6e625b7cf8bb3ba59c296cb07577297
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://traffking.ru/123?keyword=star+wars+revan+book+pdf In PDF document text
    • https://gagumosesixibo.weebly.com/uploads/1/3/4/0/134018544/4295344.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://nogosipemom.files.wordpress.com/2020/11/new_manual_lathes.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/50761821136.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0e1b13c-8a7e-4d2f-a55b-a5c477404f9a/vince_camuto_clothing_uk.pdfIn PDF document text
    • https://saridejawe.files.wordpress.com/2020/11/dagujafadupidarekef.pdfIn PDF document text
    • https://s3.amazonaws.com/xumakomowi/18730560021.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f02adcd-89d3-45a0-b829-744d2596dbb1/xitoginokorijawoxajan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38de0f2e-f0e9-4a2e-ac1a-9fa20dc7313e/download_gmail_icon_for_desktop.pdfIn PDF document text
    • https://beziduxonet.files.wordpress.com/2020/11/vomufepikarigutap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f02b459d-8c6c-46a5-b363-e6e8dcbad6e9/galoruti.pdfIn PDF document text
    • https://lumitib.files.wordpress.com/2020/11/sitejajolinu.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_off00006a7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A7B 5464 bytes
SHA-256: 979e66f7b4182c61bf85b0c6eac0b113dc3080393104dbfc2adc8959af853c3c
font_01_sfnt_off00007d33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D33 10084 bytes
SHA-256: f5bca4a62be18b2130f343812c85c356dd0aceab9e234e4a60fda198a69ab840