Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5827247e117551a…

MALICIOUS

PDF

33.8 KB Created: 2020-04-01 15:05:42 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: f2b168aa7f1c34a28671a72c4907ef90 SHA-1: f3be4b1e30497218b0ad1fe401c5902d902150b7 SHA-256: e5827247e117551a80b2b729e56a1bcfa62a4fc6c910dcd2f463f0783b2ab2ef
94 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, a technique often used for SEO spam or to distribute malicious payloads. The ML classifier strongly indicated maliciousness. No scripts were extracted, but the sheer volume of outbound links suggests a content-delivery or redirection scheme.

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://orderofthediamond.com/uploads/1/3/0/2/130272909/130272909.html#mouse+de+computadora+mercado+libre
    • http://ghostadsofbirmingham.com/uploads/1/3/0/7/130740414/zufoxupozili.pdf
    • http://theroseofthebalkans.com/uploads/1/3/1/1/131164524/kijidexeged.pdf
    • http://clinicabellet.com/uploads/1/3/0/4/130491947/gosewikuv.pdf
    • http://rptservices.org/uploads/1/3/0/5/130543488/da84bcc289.pdf
    • http://formuladriftexperience.com/uploads/1/3/0/2/130289696/xujaf-mikevuge-losegiri-wakoxirim.pdf
    • http://zgibbsportfolio.com/uploads/1/3/0/7/130775905/manerasi.pdf
    • http://pickledpretty.com/uploads/1/3/0/4/130488152/rezefilofamopuso.pdf
    • http://weeklycoinupdate.com/uploads/1/3/0/4/130436127/f0df7b44b7076ac.pdf
    • http://abglegal.com/uploads/1/3/1/3/131398184/rolijaxup.pdf
    • http://rldegraffenried.com/uploads/1/3/0/3/130324072/7038557.pdf
    • http://tlcultra.com/uploads/1/3/0/6/130604251/bawipaw-ziwulid-puganiped-xexapixuka.pdf
    • http://xn--knstlerbrewing-gsb.com/uploads/1/3/1/0/131070294/mopopamerusi-rufekijixel-liriwefebup-feroxiliwe.pdf
    • http://c2pcleaning2perfectionllc.com/uploads/1/3/0/2/130292110/6633414.pdf
    • http://whrvenue.com/uploads/1/3/0/2/130287945/e33a7ee1ec7e.pdf
    • http://marsusconsulting.com/uploads/1/3/0/5/130544387/2b39826817411.pdf
    • http://meetmeonsaturdayin.com/uploads/1/3/0/2/130289550/5706784.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_off00005bd4.bin
416c3dd24d56310400919e51bcf4d0c26a24a3b85f81519eccf4957d5e292800		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BD4 7744 bytes

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