Malicious PDF — malware analysis report

Static analysis result for SHA-256 b11518f10572a61a…

MALICIOUS

PDF

36.6 KB Created: 2020-04-02 18:18:15 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-08-25
MD5: 449712cbe9a80bcf65042747cdb258c3 SHA-1: 74af5c1cae1251f31d0149a095f7c2c26889ece2 SHA-256: b11518f10572a61ab1106833db1ff45354ca9ebe3dab056091f93a71fcc83a47
96 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. These links point to various domains, many of which appear to be part of a link farm strategy. The document body also contains a URL that appears to be a lure for 'Black clover episode 63 english dub'. The primary attack pattern is to direct users to these external sites, which could host further malicious content or phishing pages.

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://healingbyferi.com/uploads/1/3/0/7/130775373/130775373.html#black+clover+episode+63+english+dub PDF link annotation
    • http://smm-startups.com/uploads/1/3/0/4/130488544/7949903.pdfIn PDF document text
    • http://iblockgroup.com/uploads/1/3/0/4/130476053/kemusujene_mivodib_gizijozaso_zikil.pdfIn PDF document text
    • http://realhicks.com/uploads/1/3/1/3/131380415/6362743.pdfIn PDF document text
    • http://savetheoakparkjcc.com/uploads/1/3/0/6/130603815/zoluvofi.pdfIn PDF document text
    • http://marriageprom.com/uploads/1/3/0/8/130814652/gumitufidawizaruge.pdfIn PDF document text
    • http://just-smurfs.net/uploads/1/3/0/4/130489696/3571883.pdfIn PDF document text
    • http://housetechibiza.com/uploads/1/3/0/7/130739856/b4518.pdfIn PDF document text
    • http://cjmuldoon.com/uploads/1/3/0/5/130539446/30b761.pdfIn PDF document text
    • http://sweetmagnoliadecor.com/uploads/1/3/0/7/130739678/bekijarizak.pdfIn PDF document text
    • http://journeysouthbay.com/uploads/1/3/1/4/131407882/kuruwa-xadajexaf-xotofavigutedir.pdfIn PDF document text
    • http://cascadeinvestor.com/uploads/1/3/0/9/130968972/xobasupudarene.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

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006a2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A2B 6872 bytes
SHA-256: dfaf605c5c7efb4cc445075d52dbeb50b50874b270fb5aa206b5c557033a1a2e