Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e65e69d052a1df4…

MALICIOUS

PDF

41.7 KB Created: 2020-06-05 10:28:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fa3a838a6700762795b480ce99a44286 SHA-1: 37fdcb70c795ccb1d89113014a81c68209e8f651 SHA-256: 6e65e69d052a1df403ad95c9c543c1369cfd0a51d0c50e41cdeb0286c4d2a59f
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, many of which point to similarly structured URLs on different domains. This behavior is indicative of a link farm or a mechanism to distribute malicious content across multiple sites. While no scripts were directly extracted, the PDF_SEO_LINK_FARM heuristic and the sheer volume of external links suggest an attempt to manipulate search results or redirect users to potentially harmful destinations.

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://erabeatfrant.com/uploads/1/3/0/8/130813521/130813521.html#transicion+demografica+y+epidemiologica
    • http://mail.allwoodsbutchers.com/uploads/1/3/0/9/130969707/vudizuja_niziporaw_gozeni.pdf
    • http://kirstenmcgannon.com/uploads/1/3/0/4/130483550/rirefimipup.pdf
    • http://balkancaravan.com/uploads/1/3/1/4/131454850/fafbaa9d.pdf
    • http://mhdbc.org/uploads/1/3/1/3/131382366/23aea852.pdf
    • http://nicolasvaradi.com/uploads/1/3/1/4/131406686/6121007.pdf
    • http://dreamyfaces.com/uploads/1/3/0/9/130969500/5f988c20d.pdf
    • http://jardinlaalhambra.com/uploads/1/3/1/8/131856040/dapuz-juzenowaf.pdf
    • http://seussicalba.com/uploads/1/3/1/4/131454762/rasuruke.pdf
    • http://pointofhope.net/uploads/1/3/0/5/130590334/4829777.pdf
    • http://e4kh0.bpmtc.com/uploads/1/3/1/3/131397997/kukuwozedod-diduwakixuluxe.pdf
    • http://sharondawnselby.com/uploads/1/3/1/4/131407958/7485519.pdf
    • http://erabeatfrant.com/uploads/1/3/0/8/130813521/terms.html
    • http://erabeatfrant.com/uploads/1/3/0/8/130813521/dmca.html
    • http://erabeatfrant.com/uploads/1/3/0/8/130813521/policy.html
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://ragupawagev.files.wordpress.com/2020/06/fuloxa.pdf
    • https://tubanel.files.wordpress.com/2020/06/gajezebewekemivi.pdf
    • https://warepugugi.files.wordpress.com/2020/06/5849658735.pdf
    • https://rizujofug.files.wordpress.com/2020/06/64875342382.pdf
    • https://zozumak.files.wordpress.com/2020/06/gubewozimowupezekubi.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000072ed.bin
0115724626681f212bb1943560ec00db5bd86b93e8de26d0c3ad95d2cc7fadc9
pdf-font-stream PDF embedded font (sfnt) at offset 0x72ED 11624 bytes