Malicious PDF — malware analysis report

Static analysis result for SHA-256 547b0e6a4cb26e5d…

MALICIOUS

PDF

38.9 KB Created: 2020-03-22 10:53:54 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 34a04229a939f66e09a869b5c648e998 SHA-1: c4d71bbae9e1a76f01fa0a04059503c78549a1a7 SHA-256: 547b0e6a4cb26e5d1ea153dc9e397f6ec1e0df161b36b0b2afba966c79d65dcf
94 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which point to similarly structured URLs on different domains. This pattern is indicative of a link farm or a mechanism to distribute malicious content across multiple sites. The ML classifier strongly flagged this PDF as malicious, supporting the assessment that it is designed to redirect users to potentially harmful content.

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://ttthardstyle.com/uploads/1/3/0/6/130621666/130621666.html#libro+de+telesecundaria+primer+grado+matematicas+para+el+maestro
    • http://sharpeandwilliamsinc.org/uploads/1/3/0/2/130288380/6156031.pdf
    • http://suesessentiallife.com/uploads/1/3/0/5/130550956/jinukokujami_zakilotozena_gagimutod_dutaxegiku.pdf
    • http://successwealthandgoodhealth.com/uploads/1/3/0/3/130379741/7628094.pdf
    • http://ominro.com/uploads/1/3/0/7/130739200/vobaxel_vemimu_petix_xifaluxal.pdf
    • http://www.teamdynastyds.com/uploads/1/3/0/8/130874211/xivezemari.pdf
    • http://deannamcleod.com/uploads/1/3/0/6/130639037/d2dbd46878.pdf
    • http://www.koidesing.com/uploads/1/3/0/3/130313144/puguvonejevifom.pdf
    • http://shesabadassmama.com/uploads/1/3/0/4/130483110/7808607.pdf
    • http://mta-sts.mail.rvadventuretreks.com/uploads/1/3/0/6/130603989/merep.pdf
    • http://myacexportfolio.com/uploads/1/3/0/6/130621963/dekufovabi.pdf
    • http://apt17.com/uploads/1/3/0/6/130621998/sanafajilokovam_bekezufota_jinaxejiliv_mekababiwixizen.pdf
    • http://www.bkbuss.com/uploads/1/3/0/5/130551271/4948071.pdf
    • http://nysmaplepartridge.com/uploads/1/3/0/6/130621296/9124478.pdf
    • http://www.sjsldetroit.org/uploads/1/3/0/5/130588276/fffe9f81.pdf
    • http://www.coresoundretrievers.com/uploads/1/3/0/7/130740437/nuwimazez.pdf
    • http://asso-tocqueville.com/uploads/1/3/0/6/130604158/baxibebijorabuz_borofizu_tisiwube_kasevo.pdf
    • http://bethlehembaptistchurchsaginaw.com/uploads/1/3/0/5/130588257/6e7b1b6a9.pdf
    • http://adventhopefellowship.org/uploads/1/3/0/7/130740149/fujemiza_rukupos.pdf
    • http://bmbedding.com/uploads/1/3/0/6/130621223/melekijej-nikanut-robexerinaz-memilewilote.pdf
    • http://composers.directory/uploads/1/3/0/6/130621435/4883622.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_off00006c67.bin
735193ab515c1a20a970242fb525082672fc834fd81d4b499910c1ff0b403f4e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C67 9412 bytes

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