Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ae9da10e1d0f23a…

MALICIOUS

PDF

43.7 KB Created: 2020-03-21 15:55:24 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 222106069de6342f009b648527e03cc4 SHA-1: 2d26f8354caddc3a11a86e2c6c87178cd8b70b51 SHA-256: 2ae9da10e1d0f23a82f2b88261c3951bc3185c412a49d10a78ee3a0fba6e94db
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links to other PDF files hosted on various domains. This pattern is indicative of a link farm or a distribution mechanism for malicious content. The ML classifier strongly flagged this PDF as malicious. No scripts were extracted, and the document body was heavily obfuscated, limiting further analysis of the specific lure.

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://slbconsultingservices.com/uploads/1/3/0/5/130544448/130544448.html#we+were+liars+book+review
    • http://cookesbooks.com/uploads/1/3/0/2/130270963/a0f27561837.pdf
    • http://montecitovistanapa.com/uploads/1/3/0/5/130550997/7703362.pdf
    • http://reidgajewski.com/uploads/1/3/0/8/130874600/5063995.pdf
    • http://sarahljennings.com/uploads/1/3/0/6/130621915/navuvu.pdf
    • http://fashionplus1.com/uploads/1/3/0/6/130620561/pizatefokorubowavani.pdf
    • http://hostmaster.audleymills.co.uk/uploads/1/3/0/2/130287976/gokekunevuxi-jofenasitagi.pdf
    • http://cleanforetagsstad.com/uploads/1/3/0/6/130604341/vogudarelamis.pdf
    • http://www.teen-works.com/uploads/1/3/0/6/130620858/c6cd191262fbda8.pdf
    • http://www.thealzheimersillness.com/uploads/1/3/0/2/130289496/2deeb4f34c7872.pdf
    • http://equalopportunitiesllc.com/uploads/1/3/0/9/130969897/acd3cfa09894171.pdf
    • http://onevigil.com/uploads/1/3/0/2/130272295/noxomefutokuge.pdf
    • http://www.midnightdoublefeature.com/uploads/1/3/0/9/130969888/5718261.pdf
    • http://kairoshomeimprovement.org/uploads/1/3/0/8/130813618/2673092.pdf
    • http://websterwindows.net/uploads/1/3/0/2/130289166/d2f3a4973.pdf
    • http://reneedumarr.com/uploads/1/3/0/5/130550762/9788e66.pdf
    • http://www.stmarysprimarylarkhall.co.uk/uploads/1/3/0/6/130605302/mozusotuv_xipetalov_revuvu.pdf
    • http://veterinariagiada.com/uploads/1/3/0/6/130639958/2884786.pdf
    • http://www.c4u2.org/uploads/1/3/0/2/130288431/wuxez-sulojobufajeli.pdf
    • http://4lifehealthwealth.com/uploads/1/3/0/7/130776105/7665a22a7c4d53.pdf
    • http://stauffstauff.com/uploads/1/3/0/4/130483492/rejolawor.pdf
    • http://weepingneko.com/uploads/1/3/0/2/130291040/jejupexutom.pdf
    • http://wizomedia.xyz/uploads/1/3/0/8/130814021/7678a656d3a.pdf
    • http://sunnystartsperinatal.com/uploads/1/3/0/7/130738504/bamiregupatil.pdf
    • http://www.getmorningroutine.com/uploads/1/3/0/5/130588675/lakuputunotazek-kelesofivizoli-fowuzag.pdf
    • http://amazingcreationstaxidermy.com/uploads/1/3/0/3/130323532/3600886.pdf
    • http://www.getmorningroutine.com/uploads/1/3/0/5/130588675/lakuputun
    • 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_off00008288.bin
0f87b4f99336a0b9cb581dbeee57fc99786208313aee3bc276e9808255402a77		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8288 7840 bytes

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