Malicious PDF — malware analysis report

Static analysis result for SHA-256 4267faa6f81e8313…

MALICIOUS

PDF

62.0 KB Created: 2020-03-08 00:51:46 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: e935848700ffca71170058bd61f84e75 SHA-1: c92a7a44885a8a98456030318cca3ef6ff36a4a2 SHA-256: 4267faa6f81e8313f6f2216f66e5c3941555cf038e9f42ba82f4bfc97971df4f
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links, a technique commonly used for SEO poisoning to drive traffic to malicious sites. The ML classifier strongly indicated maliciousness. No scripts were extracted, but the sheer volume of outbound links suggests a content-distribution or redirection scheme.

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://taiyangchengjiawangbaosha.br3h.com/uploads/1/3/0/3/130323159/130323159.html#nios+deled+514+lesson+plan+in+english+pdf
    • http://redfishbeaufort.com/uploads/1/3/0/2/130274316/f4e42b1d.pdf
    • http://abroad4.com/uploads/1/3/0/5/130590413/8632207de.pdf
    • http://fail-ng.com/uploads/1/3/0/6/130620395/2394220.pdf
    • http://piercingpoli.com/uploads/1/3/0/4/130476880/zenowijewu-xoxerimewoduwe-xaduridogavufel.pdf
    • http://schmittwoodworkingllc.com/uploads/1/3/0/7/130740340/wabenolitib.pdf
    • http://pangeaterra.com/uploads/1/3/0/2/130288383/04e76d9ee017c7.pdf
    • http://trophypointcontracting.com/uploads/1/3/0/3/130313436/4126343.pdf
    • http://greenaviation.net/uploads/1/3/0/4/130436028/49ed0ea9.pdf
    • http://mikelindenthal.com/uploads/1/3/0/8/130813557/637e5e.pdf
    • http://tcm-filter.com/uploads/1/3/0/2/130272985/7856325.pdf
    • http://on-pointprimarycare.com/uploads/1/3/0/3/130323488/danilipasat.pdf
    • http://cartiercouturee.com/uploads/1/3/0/7/130775485/9532680.pdf
    • http://rollenundskaten.de/uploads/1/3/0/7/130740340/xujaze.pdf
    • http://tonglefangyulecheng.f18.ebkf.org/uploads/1/3/0/5/130588287/1092598.pdf
    • http://mx.c-linestables.com/uploads/1/3/0/7/130739119/5287486.pdf
    • http://hostmaster.demo18.thijsbecker.nl/uploads/1/3/0/5/130589435/xubidiwuwovu.pdf
    • http://the-blonde-effect.com/uploads/1/3/0/3/130323567/nubid.pdf
    • http://behindthea.com/uploads/1/3/0/2/130289400/fd9109.pdf
    • http://wainspection.com/uploads/1/3/0/6/130604113/1060486.pdf
    • http://ww.bgcv.org/uploads/1/3/0/2/130272945/moxugiwuvabe.pdf
    • http://acelebratedlife.com/uploads/1/3/0/2/130272344/tarodisomaluxen_gefovinosi.pdf
    • http://brockmillerbasketball.com/uploads/1/3/0/5/130545681/wikupijazamikuwo.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009aeb.bin
17cbb68eafe833d7d2f52a41ebbc3c0bd78c9c279e7705a224fcccbd35d6c3dc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9AEB 8160 bytes
font_01_sfnt_off0000ba1e.bin
76f1e5f3ce316e28cd0fcc6f6c4bca4202416ff3c7acc389c4a1b99be58ef35e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBA1E 16336 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.