Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b11fc7310341df0…

MALICIOUS

PDF

47.4 KB Created: 2020-10-30 01:52:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: ce93eaa5c16d83bbdb4e3db62739b449 SHA-1: 16991956254f1392a5507d65d8cd6527fc1c4bcc SHA-256: 7b11fc7310341df07afd2d9408fca42805121cf9ce3884b359a4f988cceac2ea
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://ttraff.me/123?keyword=eve+weapon+damage+types In PDF document text
    • https://lurukise.weebly.com/uploads/1/3/4/4/134454795/jotosiwaxaf.pdfIn PDF document text
    • https://rofowijajexer.weebly.com/uploads/1/3/4/4/134476616/berigu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388181/normal_5f9243203f32b.pdfIn PDF document text
    • https://tidemipevu.weebly.com/uploads/1/3/0/7/130740592/1df342f95.pdfIn PDF document text
    • https://jikeberu.weebly.com/uploads/1/3/1/8/131857846/zofimamolokene-supokumulal-pebexig-wezowowegese.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/nezanurugega/bisego.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b33f79fa-9cc7-46fb-b80e-950d057e645b/60829344909.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3467e5bb-a21d-4945-8a73-976e5b17f576/janofigodeja.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/32d31cf4-f97e-4fc4-b045-4365860cb17a/love_language_quiz_for_teens.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef39f008-b97b-4eba-b7a5-a334f9aa2bf5/xixafetizutukasulidepe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0022a566-c303-4c5c-b01e-b6876e7d0262/segokasifugunewolawiju.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_off00007afc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7AFC 5360 bytes
SHA-256: bb4c812d8d397732ddc2dffe6007f640fafa038c9a37879733c974fa33e7c386
font_01_sfnt_off00008d4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D4B 10632 bytes
SHA-256: 1f6497e8b38ec18d5ce70af184528ebefd624d294e5683f35714eb1bb97fa61f