Malicious PDF — malware analysis report

Static analysis result for SHA-256 1219dccf4570a1d4…

MALICIOUS

PDF

42.1 KB Created: 2020-03-21 03:13:41 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 2c622fcc693ced63488bc3ba7731f28c SHA-1: 6bb8f4283aa85c9e1c136172ac758189e91067af SHA-256: 1219dccf4570a1d4199de7812419c6fda756884979fe1cc4384403fc4af96c5b
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

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. The ML classifier also strongly indicated maliciousness. The embedded URLs likely lead to further malicious content or phishing pages, aiming to redirect the user away from the initial document.

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://the-empowered-warrior.com/uploads/1/3/0/4/130483573/130483573.html#septimo+paso+alcoholicos+anonimos
    • http://naturallymommy.com/uploads/1/3/0/5/130551251/9552652.pdf
    • http://drsdjandkaraoke.com/uploads/1/3/0/2/130289320/pezawi.pdf
    • http://skinnyfibereasy.com/uploads/1/3/0/4/130476943/22fde03ac4c.pdf
    • http://kinoseriya.club/uploads/1/3/0/7/130739053/teganuxodaparod.pdf
    • http://foreverfridayfoundation.com/uploads/1/3/0/6/130640209/mikipo_kazizasobasukib.pdf
    • http://www.nanasglitter.com/uploads/1/3/0/6/130620769/zesafusulozudoxunu.pdf
    • http://aberturasazteca.com/uploads/1/3/0/6/130621663/wobedawo_bokeruzaze_vibani_suvediwovikeb.pdf
    • http://tohrurainer.com/uploads/1/3/0/2/130288317/kexomam_neroliroze.pdf
    • http://ppal.space/uploads/1/3/0/3/130379101/lefegaranexi_kaliraguro.pdf
    • http://www.giltnerinc.org/uploads/1/3/0/8/130874378/kidejasuwemopol.pdf
    • http://pchahockey.org/uploads/1/3/0/4/130476078/zigebe.pdf
    • http://mentorhood.com.hk/uploads/1/3/0/7/130775726/kipezafujokuf-vegalubuzurezan-kefujirusado.pdf
    • http://truurelief.com/uploads/1/3/0/6/130604434/pinofefunulodowi.pdf
    • http://www.bistrosintbaafs.be/uploads/1/3/0/8/130874129/cd78644d77.pdf
    • http://my-thm-story.blog/uploads/1/3/0/3/130323249/8811560.pdf
    • http://www.elevationspeechtherapy.com/uploads/1/3/0/2/130273743/7621622.pdf
    • http://alexlyn.co/uploads/1/3/0/2/130272417/2796593.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_off00007995.bin
0a6534bcfce8921f61a737ab3ca5c00570e42946df959d02b4320d6bab506cb3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7995 8740 bytes

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