Malicious PDF — malware analysis report

Static analysis result for SHA-256 eadaa458d6b6a3e0…

MALICIOUS

PDF

53.3 KB Created: 2020-11-04 01:43:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 960b4228a2182714875593e84e1132d1 SHA-1: ed60b83b0d5480b288c236f001fd9dcdea6a3da2 SHA-256: eadaa458d6b6a3e0b7cfa691d19561af90bb2fb249334d2c2806f808dbc5d3f6
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=simo+haya+manga In PDF document text
    • https://cdn-cms.f-static.net/uploads/4375716/normal_5f95d46aabe64.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384155/normal_5f908f6c6885c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420939/normal_5f9cfc1d3517f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463543/normal_5fa1ea9e71bd1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378167/normal_5f9e888ad77ac.pdfIn PDF document text
    • https://latijazaw.weebly.com/uploads/1/3/4/3/134312978/4878287.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377704/normal_5fa19b6311bf3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446168/normal_5f9fe33463244.pdfIn PDF document text
    • https://morutasatosode.weebly.com/uploads/1/3/4/3/134366393/xotiwu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/8fa51d42-dc82-4713-b36b-691b67e2e636/unicorn_and_pegasus_called.pdfIn PDF document text
    • https://s3.amazonaws.com/rekawexuretowo/suwokolararaf.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/logical_connectors_exercises_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/wusigipufuvowix/zenith_tv_manual.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006e7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E7A 3448 bytes
SHA-256: 72c57e833607ba33ae3a458077f81cb8e35c9413d7321596555f2c120a017c82
font_01_sfnt_off00007ad3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7AD3 4996 bytes
SHA-256: 4c9a44551011f47022ac9c7369b5af944a95329e1346592a64ca3adeb45427f6
font_02_sfnt_off00008bbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BBC 11908 bytes
SHA-256: 24b4c4964a913002c28f47da11ea4652fb5ec59b21982f0870f3d3331cfb9a8f
font_03_sfnt_off0000b2a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB2A4 16204 bytes
SHA-256: e93acd332f5893643511f4cefd38969ad5c744ad1b08842a788b6be7d277dd15