Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ebb72e17a5a4921…

MALICIOUS

PDF

38.0 KB Created: 2020-06-04 08:18:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d411aa52334d6998128a2fe3a9e8d8ff SHA-1: 29255a821e761fbbcbba6fb2d880ed23d4c8eee2 SHA-256: 9ebb72e17a5a492111b21648c2262f8e7f063bacf4f5b361a05641b102a4848d
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a significant number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various domains. The document body also contains a URL that appears to be the primary lure. The ML classifier strongly indicates maliciousness. The primary attack pattern involves redirecting the user to a large collection of external PDF files, potentially for SEO spam or to host further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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 http://bikramyogacamphill.com/uploads/1/3/0/5/130551086/130551086.html#new+years+captions+for+instagram
    • http://cottoncandyandpretzels.com/uploads/1/3/0/7/130776447/gizinuguxele.pdf
    • http://lifestylesage.com/uploads/1/3/0/7/130775780/6540116.pdf
    • http://portugueshotelescumbres.devsite-1.com/uploads/1/3/0/2/130287867/f7308fd.pdf
    • http://bestyrecruitment.com/uploads/1/3/0/9/130969907/c990ccb.pdf
    • http://gilbertgregson.co.uk/uploads/1/3/0/5/130590482/5109326.pdf
    • http://mta-sts.mail.pollos-equipos.com/uploads/1/3/0/6/130620820/2a7d06df223401.pdf
    • http://thebrushmountainlodge.com/uploads/1/3/0/3/130324248/wazibunin-mimovonu-babonajid-sugenopafivata.pdf
    • http://mariostaquiza.com/uploads/1/3/1/4/131438216/jitufizuzigu_takufez_wisonogiramela_wakop.pdf
    • http://bikramyogacamphill.com/uploads/1/3/0/5/130551086/terms.html
    • http://bikramyogacamphill.com/uploads/1/3/0/5/130551086/dmca.html
    • http://bikramyogacamphill.com/uploads/1/3/0/5/130551086/policy.html
    • https://muketomed.files.wordpress.com/2020/06/gekenazililoleguzutarejir.pdf
    • https://kagalunabak.files.wordpress.com/2020/06/74935624471.pdf
    • https://xijivoziz.files.wordpress.com/2020/06/94616655846.pdf
    • https://talipedu.files.wordpress.com/2020/06/7735473859.pdf
    • https://bejuboponoku.files.wordpress.com/2020/06/dusapuwiwoxunugovo.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006829.bin
2cbbfb4f797de9c273846981e7a422911cf7ae82e15afdf754f1ad8636121368		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6829 10468 bytes

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