Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd249313af9d6ccc…

MALICIOUS

PDF

45.2 KB Created: 2020-03-08 01:17:55 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 1660daffb0d36f96778cca47ded3046c SHA-1: 426edc861d50827b23f490690072dc8bb55da6b7 SHA-256: dd249313af9d6cccfbf5d9b75137872b48d8a6da263283df1cb2f998e26fda76
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF document contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. The ML classifier also flagged this PDF as malicious with high confidence. The embedded URLs likely lead to SEO spam pages or potentially host further malicious content, aiming to redirect the user away from the initial document. No scripts were extracted from this sample.

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://927cu.salon225.com/uploads/1/3/0/6/130621708/130621708.html#athens+transport+map+pdf
    • http://www.mrsranard.com/uploads/1/3/0/5/130538902/pazofurebagabi_satadizeregaf_pidure_vowinan.pdf
    • http://www.6filmsonline.com/uploads/1/3/0/8/130815582/kudixonode-kobobelapu.pdf
    • http://mynicheblog.com/uploads/1/3/0/2/130273738/vimolo_tuvatukugamasa_darumitizoxune.pdf
    • http://dgiindex.biz/uploads/1/3/0/2/130272282/xunozoburomano-fisito.pdf
    • http://misclasesdeespanol.com/uploads/1/3/0/5/130544131/1618849.pdf
    • http://twogaygrooms.com/uploads/1/3/0/7/130739713/e5545.pdf
    • http://whattimeisitinchina.com/uploads/1/3/0/4/130476013/1ff5dbb5495.pdf
    • http://swipe-it-world.com/uploads/1/3/0/6/130605089/nutuwamijusipa.pdf
    • http://brisbanefloatandmassage.com.au/uploads/1/3/0/6/130621167/golunej.pdf
    • http://hypnobirthmelbourne.net/uploads/1/3/0/6/130639397/wulemowebobad-dezejinabigalib-temig.pdf
    • http://naomi-anderson.de/uploads/1/3/0/6/130605229/988442.pdf
    • http://tkplink.com/uploads/1/3/0/7/130738631/ae6f1940f1.pdf
    • http://sidekickvsc.net/uploads/1/3/0/3/130323762/kibon.pdf
    • http://www.psychotherapykristaroesler.com/uploads/1/3/0/5/130590295/mutezonenev_saseraw_lexukaserad.pdf
    • http://desatascossantceloni.net/uploads/1/3/0/2/130272551/eeb657d4f0f62b8.pdf
    • http://xn--cd-8h72a.to/uploads/1/3/0/7/130775241/besawasofeka_dekefana.pdf
    • http://davisenergymedicine.com/uploads/1/3/0/7/130739223/5166365.pdf
    • http://mattwolbertphotography.com/uploads/1/3/0/7/130739371/c15cae.pdf
    • http://cpanel.gortonsfloors.com/uploads/1/3/0/8/130813054/381643.pdf
    • http://sparkfizz.net/uploads/1/3/0/6/130621072/5192488.pdf
    • http://www.ecvssedu.com/uploads/1/3/0/4/130435732/d6534dbd110.pdf
    • http://jameswallach.net/uploads/1/3/0/2/130289410/7e1d95.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_off000086db.bin
1e45cb516a634655ddea24f9e39475ce6298dc81dea165af426392f1b6c52b0d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x86DB 8476 bytes

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