Malicious PDF — malware analysis report

Static analysis result for SHA-256 090b92586daf47a8…

MALICIOUS

PDF

61.8 KB Created: 2020-03-24 08:54:33 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: b2630bec5e8ac5c0a166b1b40b7d9423 SHA-1: 699d4ba3869ed86ba9b32ec401416206acb8c193 SHA-256: 090b92586daf47a86645216185c40e2783ec0f4ed52427c64185e34430e6fc86
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or SEO manipulation tactic. One of the embedded URLs is http://bowencreativelabs.info/uploads/1/3/0/5/130546606/130546606.html#juegos+en+grupo+para+adolescentes. While no scripts were explicitly extracted, the presence of numerous external links and the ML classifier's high confidence indicate malicious intent, likely related to redirecting users to potentially harmful sites.

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://bowencreativelabs.info/uploads/1/3/0/5/130546606/130546606.html#juegos+en+grupo+para+adolescentes
    • http://bestpoolserviceglendale.com/uploads/1/3/1/0/131070062/8347242.pdf
    • http://moonshinemanorweddings.com/uploads/1/3/0/4/130483244/guwezijemete_vuzip_nifun_repetonilelu.pdf
    • http://exploredreamdiscover.org/uploads/1/3/0/7/130739802/8457548.pdf
    • http://myopsconsulting.com/uploads/1/3/0/5/130544751/1260958.pdf
    • http://rtocycles.com/uploads/1/3/0/5/130551524/tukenelowav_nugavegaruz_zetunobosuzuluv.pdf
    • http://equivally.com/uploads/1/3/0/6/130603682/fapomorod_kexulosal.pdf
    • http://cjentzart.com/uploads/1/3/0/5/130543064/e51cb.pdf
    • http://webmail.beinmaroc.net/uploads/1/3/0/6/130604039/setupaxarokug_vazobujoman.pdf
    • http://miloandmonroeboutique.com/uploads/1/3/0/6/130639052/476266e349ea.pdf
    • http://mta-sts.anablogue.com/uploads/1/3/0/6/130621436/8439999.pdf
    • http://familiadiesa.com/uploads/1/3/0/5/130551880/7a9207d165.pdf
    • http://howtoadwords.net/uploads/1/3/0/5/130539553/5991946.pdf
    • http://thewellnesscoaches.com/uploads/1/3/0/4/130436390/51c37f9d6.pdf
    • http://www.cheftaylorreilly.com/uploads/1/3/0/5/130589431/mukotadap.pdf
    • http://fernandinabeachinsurance.com/uploads/1/3/0/5/130551013/lotifepix-ruzisirag.pdf
    • http://happihearts.net/uploads/1/3/0/3/130323892/0abcf14464b1b.pdf
    • http://webdisk.alisonrothman.com/uploads/1/3/0/7/130776889/sirabona_wujazumul_wafoxopewirew.pdf
    • http://www.plantshappen.com.au/uploads/1/3/0/7/130739889/e3bc6c1a35d2b88.pdf
    • http://fields-auto.com/uploads/1/3/0/7/130738786/0bc1673.pdf
    • http://lovelyjubblykids.com/uploads/1/3/0/3/130379319/posomix.pdf
    • http://www.luciaperillo.net/uploads/1/3/0/2/130272973/xikopinen.pdf
    • http://lilafy.com/uploads/1/3/0/7/130775209/01120db5a44dc7a.pdf
    • http://tonces.net/uploads/1/3/0/6/130620763/fodesa.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_off0000c57d.bin
1174d2669e8c62c0045b2a3d1e09a4bb4c2632f654879c09ca15e1854f9ac0bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC57D 9400 bytes

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