Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc4210edd65e2be2…

MALICIOUS

PDF

73.2 KB Created: 2021-03-30 20:58:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c58569582482a0c7548561cb5c50679c SHA-1: 17929178740c9ad95a9ee834290be328f06c4060 SHA-256: cc4210edd65e2be2bf6549b4a4aa74b820035c3e2403dda84bccdc671815e948
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 pointing to Weebly-hosted PDFs, suggesting a link farm or a method to distribute further malicious content. The ML classifier strongly indicated maliciousness, and the presence of embedded URLs further supports a malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 https://xezojetit.ru/123?utm_term=5+point+likert+scale+template
    • https://pusetuliv.weebly.com/uploads/1/3/1/6/131607438/gugoxalud.pdf
    • https://fupodakabapamom.weebly.com/uploads/1/3/4/4/134489617/puvuv-rerubodudewew.pdf
    • http://portkamesto.site/5571136876lkjxc.pdf
    • https://rirofogarerena.weebly.com/uploads/1/3/0/7/130775169/luwebusizavitu.pdf
    • http://compte-cmbretagne.best/218684745710bpbp.pdf
    • https://jinafoxibufesow.weebly.com/uploads/1/3/5/2/135293268/5323149.pdf
    • https://pakilimog.weebly.com/uploads/1/3/4/3/134363837/giwajomibigip-kozitelago.pdf
    • http://uuuuull.space/duwopizugonopupuwesodutiunly1.pdf
    • https://dataremidesop.weebly.com/uploads/1/3/4/6/134697992/geninipoxeresux-ruvovuba.pdf
    • https://cdn-cms.f-static.net/uploads/4408460/normal_601711d6b7af1.pdf
    • https://cdn-cms.f-static.net/uploads/4445871/normal_603ec4b71ec99.pdf
    • http://hellochildren.online/1999_ford_explorer_sport_owners_manualcb4c6.pdf
    • https://nuzojumikosa.weebly.com/uploads/1/3/0/8/130814298/kimir.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/nuxomigo/android_auto_3._0_apk_mirror.pdf
    • https://s3.amazonaws.com/jizubisetebof/rutujixozevovetidowap.pdf
    • https://s3.amazonaws.com/gedesisumi/allahu_akbar_mlg_remix.pdf
    • https://s3.amazonaws.com/xakajoziwibi/petutolo.pdf
    • https://s3.amazonaws.com/sizadagazagaj/1582672224.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e32c.bin
c9821f3e859dbfc0cd279176c60aa4815066cd03ae9dff52b2482ef4e9f1a9b2
pdf-font-stream PDF embedded font (sfnt) at offset 0xE32C 5172 bytes
font_01_sfnt_off0000f4b1.bin
6d5f3441f75f8646f2766d9757a19f2b47b7bdb25dbcb3a0c1517d5027fb7b0a
pdf-font-stream PDF embedded font (sfnt) at offset 0xF4B1 10404 bytes