Malicious PDF — malware analysis report

Static analysis result for SHA-256 d734b41d7462ef0d…

MALICIOUS

PDF

36.7 KB Created: 2020-05-17 07:12:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1ab021461afdc9cd978f1a2b8710a76f SHA-1: 17685cfcba7336787ae0b92c3d7b284f656ca3f1 SHA-256: d734b41d7462ef0d21fa3ec2971d8b3bdd0ecb87759e34968d5dffcab142e756
94 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to other PDF files on various domains. This behavior is indicative of a link farm or a mechanism to distribute malicious content. The ML classifier strongly flagged this PDF as malicious, and the presence of numerous external URIs supports this assessment. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://sauerlandhypotheek.nl/uploads/1/3/1/3/131379991/131379991.html#ek+chumma+mp4+song+free
    • http://pathpublications.com/uploads/1/3/0/4/130436224/saletolojulajax.pdf
    • http://charysewilliams.com/uploads/1/3/1/4/131437812/kebosubeniloz.pdf
    • http://alexanderofficepark.com/uploads/1/3/0/3/130379458/2065854.pdf
    • http://bouquetbuffetllc.com/uploads/1/3/0/8/130874029/reniru-ripexa.pdf
    • http://yauno-olijven.nl/uploads/1/3/0/3/130323216/wipewitewom.pdf
    • http://newyorkhoopdance.com/uploads/1/3/0/2/130287942/9dbc6d507.pdf
    • http://trialanalysiscorporation.com/uploads/1/3/0/6/130621912/6509812.pdf
    • http://stuartestates.com/uploads/1/3/1/4/131454501/2298269.pdf
    • http://caspianplumbinggasandroofplumbing.com/uploads/1/3/0/5/130539099/limaluzidibozefi.pdf
    • http://beyondordinaryservices.com/uploads/1/3/1/4/131455247/dujaxaripazoba_tobuju_sigusiva_tatoregutavi.pdf
    • http://rivertownglass.com/uploads/1/3/1/6/131606011/xedeb.pdf
    • http://kaeleysmithmusic.com/uploads/1/3/0/6/130621315/6c0ceaa.pdf
    • http://ceasultrezirii.com/uploads/1/3/1/4/131409170/fepeweda-futok.pdf
    • http://juneradicchi.com/uploads/1/3/0/4/130476298/4afbe28271f.pdf
    • http://buckcreekoutdoors.com/uploads/1/3/0/5/130589384/niloravokom.pdf
    • http://magicbenyoung.com/uploads/1/3/1/3/131384714/8767342.pdf
    • http://gaybies.org/uploads/1/3/0/5/130588675/7146811.pdf
    • http://mrgallant.ca/uploads/1/3/1/3/131397973/a484d0686557a.pdf
    • http://offtraining.net/uploads/1/3/0/8/130874085/lejedijube-bakoli.pdf
    • http://mydadisafifodad.com/uploads/1/3/1/8/131856050/1114069.pdf
    • http://genonthe.net/uploads/1/3/0/6/130639685/78a8d6d72.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_off000062fe.bin
eeb09a2320cf482da4771c611695c3cf754897b081368eb15e3ac62e823b4583		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62FE 10616 bytes

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